Default actions of the node abnormal condition program DFHZNAC
The default actions of the node abnormal condition program, DFHZNAC, vary, depending on the terminal error code and system sense codes received from z/OS® Communications Server. In most cases, DFHZNAC issues messages and sets one or more “action flags” in the communication area passed to the node error program, DFHZNEP. DFHZNEP then has the opportunity to change the default actions (though not the messages) by setting or resetting flags. (Note, however, that in some circumstances, the actions taken can vary from the actions set, depending on the state of the node at the time of the error.)
For more information about DFHZNAC and DFHZNEP, see Writing a node error program.
Default actions for terminal error codes
Terminal error codes from z/OS Communications Server are put in a 1-byte field (TWAEC) of the communications area passed to DFHZNEP.
Table 1 shows the message issued and action flags set by DFHZNAC for each terminal error code.
The figures in the “Action flags set” column are translated into bit settings and explained in Table 3.
| Error code | Symbolic label | Message | Action flags set |
|---|---|---|---|
| X'10' | TCZSRCTU | DFHZC2405 | 18 |
| X'11' | TCZSRCBF | DFHZC2403 | 2 5 7 18 24 |
| X'13' | TCZSRCVH | DFHZC2416 | 7 18 24 |
| X'14' | TCZLRCER | DFHZC2404 | 2 3 7 9 10 11 23 24 |
| X'15' | TCZSRCPF | DFHZC2407 | 2 3 7 9 10 11 24 |
| X'16' | TCZDMIT | DFHZC3492 | None |
| X'18' | TCZLRCNR | DFHZC2404 | 2 3 7 9 10 11 23 24 |
| X'19' | TCZSRCTS | DFHZC2406 | 9 10 11 18 |
| X'1A' | TCZSRCVE | DFHZC2408 | 2 3 7 9 10 11 24 |
| X'1D' | TCZSRCVI | DFHZC2417 | 2 7 24 |
| X'1E' | TCZSRCV2 | DFHZC2408 | 2 3 7 9 10 11 24 |
| X'20' | TCZVTAMI | DFHZC2417 | None |
| X'21' | TCZLUCF1 | DFHZC4902 | 3 7 9 10 11 24 |
| X'22' | TCZLUCF2 | DFHZC4903 | 3 7 9 10 11 24 |
| X'23' | TCZFSMBE | DFHZC4904 | 3 7 9 10 11 24 |
| X'24' | TCZFSMCS | DFHZC4905 | 3 7 9 10 11 24 |
| X'25' | TCZFSMCR | DFHZC4906 | 3 7 9 10 11 24 |
| X'26' | TCZSDLER | DFHZC4907 | 3 7 9 10 11 24 |
| X'28' | TCZRVLER | DFHZC4909 | 3 7 9 10 11 24 |
| X'29' | TCZRVLRB | DFHZC4910 | 3 7 9 10 11 24 |
| X'2A' | TCZRLPEX | DFHZC4911 | 2 3 7 9 10 11 24 |
| X'2B' | TCZRLPBD | DFHZC4912 | 2 3 7 9 10 11 24 |
| X'2C' | TCZRLPDR | DFHZC4913 | 2 3 7 9 10 11 24 |
| X'2D' | TCZRLPIL | DFHZC4914 | 2 3 7 9 10 11 24 |
| X'2E' | TCZRLPEC | DFHZC4915 | 2 3 7 9 10 11 24 |
| X'2F' | TCZRLPRR | DFHZC4916 | 2 3 7 9 10 11 24 |
| X'30' | TCZRLPIF | DFHZC4917 | 2 3 7 9 10 11 24 |
| X'31' | TCZRLPIR | DFHZC4918 | 2 3 7 9 10 11 24 |
| X'32' | TCZRLXCL | DFHZC4922 | 7 20 |
| X'33' | TCZIVIND | DFHZC4919 | 2 3 7 9 10 11 24 |
| X'34' | TCZIVDAT | DFHZC4920 | 2 3 7 9 10 11 24 |
| X'35' | TCZRTMT | DFHZC4930 | 2 3 7 9 10 11 24 |
| X'36' | TCZXSBL | None | 24 |
| X'37' | TCZXSHRA | DFHZC3470 | 9 10 11 24 |
| X'38' | TCZXSWAS | DFHZC6596 | 2 3 7 15 24 |
| X'39' | TCZXSABN | DFHZC6595 | 2 3 5 7 24 |
| X'3A' | TCZXSHR | DFHZC6594 | 7 24 |
| X'3B' | TCZXSBC | DFHZC6593 | None |
| X'3C' | TCZXUVAR | DFHZC3488 | 2 3 7 9 10 11 24 |
| X'3D' | TCZXMSG | None | None |
| X'3E' | TCZXERR | DFHZC6591 | 7 9 10 11 15 24 |
| X'3F' | TCZXRST | DFHZC6590 | None |
| X'40' | TCZINCPY | DFHZC2489 | 3 9 11 |
| X'41' | TCZTOLRQ | DFHZC2490 | 2 3 7 9 10 11 15 24 |
| X'42' | TCZUNPRT | DFHZC2497 - See 1 | None |
| X'43' | TCZCPYNS | DFHZC2434 | 3 11 |
| X'44' | TCZSRCDE | DFHZC2456 | 2 3 7 9 10 11 24 |
| X'45' | TCZCHMX | DFHZC3400 | 3 10 11 22 |
| X'46' | TCZOCIR | DFHZC3402 | 3 9 10 11 |
| X'47' | TCZGMMS | None 2 | 13 |
| X'48' | TCZOPSIN | DFHZC3461 | 7 , 8 |
| X'49' | TCZCLSIN | DFHZC3462 | 7 |
| X'4A' | TCZOPACB | DFHZC3463 | None |
| X'4B' | TCZICPUT | DFHZC2498 | None |
| X'4C' | TCZDSPCL | DFHZC3481 | 2 3 7 9 10 11 24 |
| X'4D' | TCZSLSRL | DFHZC3473 | None |
| X'4E' | TCZUNBFE | DFHZC3479 | 2 3 7 9 10 11 24 |
| X'4F' | TCZCNOS0 | None | None |
| X'50' | TCZSDRE3 | DFHZC3417 | 3 7 9 10 11 24 |
| X'51' | TCZBDPRI | DFHZC3418 | 3 7 9 10 11 24 |
| X'52' | TCZBDUAC | DFHZC3419 | 2 3 5 7 |
| X'53' | TCZBDTOS | DFHZC3420 | 7 20 |
| X'54' | TCZUNBIS | DFHZC3434 | 2 3 7 9 10 11 24 |
| X'55' | TCZEMWBK | DFHZC3440 | None |
| X'56' | TCZXRFVS | DFHZC6598 | None |
| X'57' | TCZRELIS | DFHZC3464 | 7 20 |
| X'58' | TCZERMGR | DFHZC3433 | 7 |
| X'59' | TCZROCT | DFHZC2443 | 2 3 7 9 10 11 24 |
| X'5A' | TCZSBIRV | DFHZC3421 | 7 20 |
| X'5B' | TCZNSP01 | DFHZC3422 | 2 3 7 9 10 11 18 24 |
| X'5C' | TCZNSP02 | DFHZC3424 | 7 9 10 11 15 24 |
| X'5D' | TCZPRDTO | DFHZC0101 | None |
| X'5E' | TCZBRUAC | DFHZC3454 | 2 3 5 7 18 24 |
| X'5F' | TCZBDSQP | DFHZC3455 | 2 3 5 7 18 24 |
| X'60' | TCZUNCMD | DFHZC2421 | 2 3 7 9 10 11 24 |
| X'62' | TCZVTAMQ | None 3 | 24 |
| X'63' | TCZVTAMO | DFHZC3441 | None |
| X'64' | TCZVTAMA | DFHZC3443 | None |
| X'65' | TCZINVRR | DFHZC2448 | 2 3 7 10 11 22 23 24 |
| X'66' | TCZSIGR | DFHZC3452 | None |
| X'67' | TCZVTAMK | DFHZC3442 | None |
| X'69' | TCZSEXOS | DFHZC3466 | 7 20 23 |
| X'6A' | TCZTIOAE | DFHZC3444 | 1 2 3 7 9 10 11 24 |
| X'6B' | TCZNOTNA | DFHZC3495 | 7 24 |
| X'6C' | TCZPSAF | DFHZC0155 | 3 6 7 9 10 11 24 |
| X'6D' | TCZPSAR | DFHZC0156 | 7 |
| X'70' | TCZCLRRV | DFHZC3468 | 7 9 10 11 15 24 |
| X'71' | TCZPSLE | DFHZC0147 | 3 6 7 9 10 11 24 |
| X'72' | TCZPSVF | DFHZC0148 | 7 9 10 11 24 |
| X'73' | TCZSDSE4 | DFHZC2437 | 3 9 11 |
| X'74' | TCZSDSE5 | DFHZC2423 | 3 7 9 10 11 24 |
| X'75' | TCZSESE1 | DFHZC2424 | 3 7 9 10 11 15 24 |
| X'76' | TCZLGNA | DFHZC2487 | 3 |
| X'77' | TCZDMRY | DFHZC2488 | None |
| X'78' | TCZSDRE2 | DFHZC2430 | 3 9 11 22 |
| X'79' | TCZPSRAF | DFHZC0145 | 3 6 7 9 10 11 24 |
| X'7A' | TCZPSRAC | DFHZC0144 | 7 11 |
| X'7C' | TCZPSANR | DFHZC0157 | 3 7 9 10 11 24 |
| X'7D' | TCZRABUS | DFHZC4949 | 2 3 7 9 10 11 24 |
| X'80' | TCZSRCSP | DFHZC2414 | None |
| X'81' | TCZSSXNR | DFHZC2432 | None |
| X'82' | TCZSSXUC | DFHZC2419 | 2 3 7 9 10 11 23 24 |
| X'83' | TCZSSXAR | DFHZC2450 | None |
| X'84' | TCZSSXIB | DFHZC2446 | 2 3 7 9 10 11 23 24 |
| X'85' | TCZUNEGR | DFHZC3409 | 2 3 7 9 10 11 23 24 |
| X'88' | TCZLEXCI | DFHZC2467 | 2 3 7 9 10 11 23 24 |
| X'89' | TCZLEXUS | DFHZC2468 | 2 3 7 9 10 11 24 |
| X'8A' | TCZLUSRR | DFHZC4937 | 2 3 5 7 24 |
| X'8B' | TCZLUSRF | DFHZC4938 | 2 3 5 7 24 |
| X'8C' | TCZLUPUN | DFHZC4939 | 2 3 5 7 24 |
| X'8D' | TCZLUPLK | DFHZC4941 | 2 3 5 7 24 |
| X'8E' | TCZLUPEX | DFHZC4942 | 2 3 5 7 24 |
| X'8F' | TCZLUSKN | DFHZC4940 | 2 3 5 7 24 |
| X'90' | TCZLGCER | DFHZC2422 | 1 2 3 6 9 10 11 23 24 |
| X'91' | TCZRSTLE | DFHZC2429 | 3 10 11 |
| X'92' | TCZSDSE6 | DFHZC2428 | 3 9 11 |
| X'93' | TCZRACET | DFHZC2455 | 2 3 9 10 11 |
| X'94' | TCZRACES | DFHZC2426 | 2 3 9 10 11 22 |
| X'95' | TCZSDSE8 | DFHZC2445 | 3 9 11 |
| X'96' | TCZRVSZ1 | DFHZC2435 | 3 7 10 11 24 |
| X'97' | TCZRVSZ3 | DFHZC2436 | 3 10 11 |
| X'98' | TCZACT01 | DFHZC2439 | 2 18 |
| X'99' | TCZSDSE7 | DFHZC2459 | 3 9 11 |
| X'9A' | TCZDOMCF | DFHZC2447 | 3 9 10 11 23 |
| X'9B' | TCZRACNL | DFHZC2486 | 3 |
| X'9D' | TCZRSPER | DFHZC3465 | 1 2 3 7 9 10 11 23 |
| X'9E' | TCZDEVND | DFHZC3472 | None |
| X'A0' | TCZNOISC | DFHZC3480 | 7 23 24 |
| X'A1' | TCZRVSZ2 | DFHZC2438 | 3 10 11 |
| X'A2' | TCZPRGE | DFHZC4945 | 3 7 9 10 11 24 |
| X'A3' | TCZBKTSE | DFHZC2444 | 2 3 7 9 10 11 24 |
| X'A7' | TCZBOEB | DFHZC2449 | 2 3 7 11 18 22 24 |
| X'A8' | TCZFMHLE | DFHZC2471 | 2 3 4 7 10 11 22 24 |
| X'A9' | TCZRACRF | DFHZC2472 | 11 |
| X'AA' | TCZSDSE9 | DFHZC2473 | 3 9 11 |
| X'AB' | TCZLUERR | DFHZC3470 | 7 9 10 11 24 |
| X'AC' | TCZVRDAC | DFHZC3474 | 7 9 10 11 24 |
| X'AD' | TCZNRLUF | DFHZC3475 | 7 9 10 11 24 |
| X'AE' | TCZRCLUF | DFHZC3476 | 7 9 10 11 24 |
| X'AF' | TCZCLEAN | DFHZC3477 | 7 9 10 11 24 |
| X'B0' | TCZEXRO | DFHZC3491 | 7 15 24 |
| X'B1' | TCZRPLAC | DFHZC2401 | 2 3 7 9 10 11 23 24 |
| X'B2' | TCZSDAUC | DFHZC2425 | 3 7 9 10 11 15 24 |
| X'B3' | TCZBDBND | DFHZC4929 | 2 3 5 7 24 |
| X'B4' | TCZRSNE | DFHZC2402 | 3 11 |
| X'B5' | TCZSAXUC | DFHZC2420 | 2 3 7 9 10 11 23 24 |
| X'B6' | TCZNSEED | DFHZC4924 | 2 3 5 7 24 |
| X'B7' | TCZASINC | DFHZC4925 | 2 3 5 7 24 |
| X'B8' | TCZEVBAD | DFHZC4926 | 2 3 5 7 24 |
| X'B9' | TCZFMH12 | DFHZC4927 | 2 3 5 7 24 |
| X'BB' | TCZSEXUC | DFHZC2418 | 2 3 7 9 10 11 23 24 |
| X'BC' | TCZINIIR | DFHZC3410 | 2 3 9 10 11 |
| X'BD' | TCZDESGM | DFHZC4928 | 7 24 |
| X'BE' | TCZBFAIL | DFHZC4944 | 2 3 5 24 |
| X'BF' | TCZCPFAL | DFHZC3490 | 7 24 |
| X'C0' | TCZDWEGF | DFHZC3499 | None |
| X'C1' | TCZSRCAT | DFHZC2400 | 2 3 7 9 10 11 23 24 |
| X'C2' | TCZLUINP | DFHZC3486 | 7 24 |
| X'C3®' | TCZCPFAL | DFHZC3490 | 24 |
| X'C5' | TCZSRCNA | DFHZC2427 | 2 |
| X'C6' | TCZPASSD | DFHZC3484 | None |
| X'C7' | TCZPSPRE | DFHZC3485 | 7 24 |
| X'C8' | TCZLUINH | DFHZC3489 | 7 18 24 |
| X'C9' | TCZNPSAU | DFHZC3487 | 7 24 |
| X'CB' | TCZSRCTC | DFHZC2431 | 2 3 9 10 11 |
| X'CC' | TCZSRCCI | DFHZC2451 | 2 3 9 10 11 |
| X'CD' | TCZSRCCX | DFHZC2454 | 2 3 9 10 11 |
| X'CE' | TCZVHOLD | DFHZC3469 | 7 9 10 11 24 |
| X'CF' | TCZVRNOP | DFHZC3471 | 7 9 10 11 24 |
| X'D0' | TCZTXCS | DFHZC2409 | 2 3 7 9 10 11 15 24 |
| X'D1' | TCZTXCU | DFHZC2410 | 2 3 7 9 10 11 24 |
| X'D3' | TCZDMPD | DFHZC2463 | None |
| X'D4' | TCZCXRR | DFHZC2453 | 1 2 3 9 10 |
| X'D5' | TCZCXE2 | DFHZC2452 | 3 7 9 10 11 18 24 |
| X'D6' | TCZSXC2 | DFHZC2441 | None |
| X'D7' | TCZSXC1 | DFHZC2440 | None |
| X'D8' | TCZRNCH | DFHZC2457 | 2 3 7 9 10 11 24 |
| X'D9' | TCZYX43 | DFHZC2469 | 2 3 9 10 11 |
| X'DA' | TCZSXC3 | DFHZC2470 | 7 9 10 11 24 |
| X'DB' | TCZPIPL | DFHZC2117 | 7 9 10 11 23 24 |
| X'DC' | TCZPXE1 | DFHZC2442 | None |
| X'DD' | TCZPXE2 | DFHZC2458 | None |
| X'DE' | TCZPIPP | DFHZC2119 | 7 9 10 11 23 24 |
| X'DF' | TCZDMGF | DFHZC3482 | None |
| X'E0' | TCZDMSN | DFHZC2411 | None |
| X'E1' | TCZDMRA | DFHZC2412 | None |
| X'E2' | TCZDMCL | DFHZC2413 | 2 |
| X'E3' | TCZCNCL | DFHZC2485 | 3 9 10 11 |
| X'E4' | TCZAIER | DFHZC2433 | None |
| X'E6' | TCZDMLG | DFHZC2404 | None |
| X'E8' | TCZDMSLE | DFHZC3416 | 2 3 |
| X'E9' | TCZSTIND | DFHZC2102 | 3 |
| X'EA' | TCZSTLER | DFHZC3432 | 2 3 |
| X'EB' | TCZSTRMH | DFHZC3428 | 3 |
| X'EC' | TCZSTRMM | DFHZC3429 | 2 3 7 |
| X'ED' | TCZRTHS | DFHZC3403 | 2 3 7 9 10 11 23 24 |
| X'EF' | TCZSTIN | DFHZC3431 | 2 3 |
| X'F1' | TCZBDMOD | DFHZC4931 | 7 18 24 |
| X'F2' | TCZEXRVT | DFHZC2469 | 2 3 9 10 11 |
| X'F3' | TCZICTYP | DFHZC4932 | 2 3 7 24 |
| X'F4' | TCZIDBA | DFHZC4933 | 2 3 24 |
| X'F5' | TCZISYNL | DFHZC4934 | 2 3 7 24 |
| X'F6' | TCZIUOW | DFHZC4935 | 2 3 7 24 |
| X'F7' | TCZIFMHL | DFHZC4936 | 2 3 7 24 |
| X'F8' | TCZFSMRB | DFHZC4943 | 3 7 9 10 11 24 |
| X'F9' | TCZINVAT | DFHZC4946 | 2 3 7 24 |
| X'FA' | TCZLUSEC | DFHZC4947 | 2 3 7 24 |
| X'FB' | TCZPSUNB | DFHZC0125 | 7 |
| X'FC' | TCZPSOPN | DFHZC0131 | 7 |
| X'FD' | TCZPSRC | DFHZC0146 | 7 |
| X'FE' | TCZPSRF | DFHZC0150 | 3 6 7 9 10 11 15 24 |
| X'FF' | TCZPSPE | DFHZC0149 | 7 |
Notes:
- See message DFHZC2497 or DFHZC3493, depending on the device type.
- “Good morning” message to be sent.
- Cancel task, and close z/OS Communications Server session owing to quick close or abend.
Default actions for system sense codes
Table 2 shows the message issued and action flags set by DFHZNAC for each inbound system sense code received. The figures in the “Action flags set” column are translated into bit settings and explained in Table 3.
| Sense code | Message | Action flags set |
|---|---|---|
| X'0001' 1 | DFHZC3401 | 2 |
| X'0002' 1 | DFHZC3415 | 2, 3, 10, 11 |
| X'0003' 1 | DFHZC3449 | None |
| X'0004' 1 | DFHZC3450 | None |
| X'0007' 1 | DFHZC3451 | None 2 |
| X'00FF' | DFHZC3446 | 2, 3, 7, 9, 10, 11, 23, 24 |
| X'0801' | DFHZC2476 | 3, 9, 10, 11 |
| X'0802' | DFHZC2461 | None |
| X'0806' | DFHZC3426 | None |
| X'0807' | DFHZC3411 | None |
| X'080B' | DFHZC2462 | 2, 3, 7, 9, 10, 11, 15, 24 |
| X'080E' | DFHZC3448 | 23 |
| X'080F' | DFHZC3436 | 9, 10, 11 |
| X'0811' | DFHZC2464 | 9, 10, 11 |
| X'0812' | DFHZC2465 | 2, 3 |
| X'081B' | DFHZC2483 | 2, 3 3 |
| X'081C' | DFHZC2466 | 2, 3, 9, 10, 11 |
| X'0824' | DFHZC2475 | 3, 9, 10, 11 |
| X'0825' | DFHZC2484 | 2, 3, 9, 10, 11 |
| X'0826' | DFHZC3423 | 2, 3, 9, 10, 11 |
| X'0827' | DFHZC2480 | 3 |
| X'0829' | DFHZC3407 | 1, 2, 3, 7,10, 11, 24 |
| X'082A' | None 4 | 9 |
| X'082B' | DFHZC3408 | 2, 3, 10, 11, 13 |
| X'082D' | DFHZC3413 | None |
| X'082E' | DFHZC3412 | None |
| X'082F' | DFHZC3414 | 2, 3, 9, 10, 11 |
| X'0831' | DFHZC3438 | None |
| X'0833' | DFHZC3427 | None |
| X'0847' | DFHZC3439 | None |
| X'084A' | None 5 | None |
| X'084C' | DFHZC3467 | 9, 10, 11 |
| X'0860' | DFHZC3459 | None |
| X'0863' | DFHZC3460 | 9, 10, 11 |
| X'0864' | DFHZC2475 | 3, 9, 10, 11 |
| X'0865' | DFHZC2465 | 3, 9, 10, 11 |
| X'0866' | DFHZC2475 | 3, 9, 10, 11 |
| X'0867' | None 6 | 9, 10, 11 |
| X'0868' | DFHZC3456 | 2, 9, 10, 11 |
| X'0869' | DFHZC3457 | 2, 9, 10, 11 |
| X'08FF' | DFHZC3447 | 2, 3, 7, 9, 10, 11, 24 |
| X'1000' | DFHZC3494 | 2, 3, 9, 10, 11 |
| X'1001' | DFHZC2481 | 2, 3, 9, 10, 11, 14 |
| X'1002' | DFHZC2481 | 2, 3, 9, 10, 11, 14 |
| X'1003' | DFHZC2479 | 2, 3, 9, 10, 11, 14 |
| X'1005' | DFHZC3406 | 2, 3, 4, 9, 10, 11, 14 |
| X'1008' | DFHZC2478 | None |
| X'1009' | DFHZC3458 | 2, 9, 10, 11 |
| X'10FF' | DFHZC3446 | 2, 3, 7, 9, 10, 11, 23, 24 |
| X'2003' | DFHZC3405 | 2, 3, 7, 9, 10, 11, 15, 24 |
| X'20FF' | DFHZC3445 | 2, 3, 7, 9, 10, 11, 23, 24 |
| X'400B' | DFHZC2477 | 1, 3, 11 |
| X'40FF' | DFHZC3453 | 2, 3, 7, 9, 10, 11, 23, 24 |
| X'8000' | DFHZC3435 | 2, 3, 7, 9, 10, 11, 18, 24 |
| X'8005' | DFHZC3435 | 2, 3, 7, 9, 10, 11, 18, 24 |
| X'80FF' | DFHZC3435 | 2, 3, 7, 9, 10, 11, 18, 23, 24 |
| X'FFFF' | DFHZC2460 | 2, 3, 7, 9, 10, 11, 23, 24 |
Note:
- The system sense code is in the form of an LUSTATUS command code.
- No action flags are set if a task is attached or if outstanding operations are to complete. Otherwise, flag 21 is set.
- Action flags 2 and 3 are set for negative response received for a SEND that requested a definite response.
- Presentation space error.
- Presentation error on read. Display buffer alteration, due to operator intervention, detected on a READ command to a compatibility-mode logical unit.
- Function abend received from a device. A negative response to a chain was sent, but purged.
Action flag settings and meanings
Table 3 shows the “action flags” that can be set by DFHZNAC in the communication area passed to DFHZNEP. The flags set by DFHZNAC represent the default actions that will be taken if the settings are not changed by DFHZNEP.
The figures in the “Flag” column refer to those in columns 3 of Table 1 and Table 2.
| Flag | Field | Bit mask | Hex bit setting | Action |
|---|---|---|---|---|
| 1 | TWAOPT1 | 1... .... | X'80' | Print action flags |
| 2 | .1.. .... | X'40' | Print z/OS Communications Server RPL | |
| 3 | ..1. .... | X'20' | Print TCTTE | |
| 4 | ...1 .... | X'10' | Print TIOA | |
| 5 | .... 1... | X'08' | Print BIND area | |
| 6 | .... .1.. | X'04' | System dump if no task attached | |
| 7 | .... ..1. | X'02' | Print network-qualified name (NQNAME) | |
| 8 | .... ...1 | X'01' | Print TN3270 IP address (TNADDR) | |
| 9 | TWAOPT2 | 1... .... | X'80' | Cancel any send for this terminal |
| 10 | .1.. .... | X'40' | Cancel any receive for this terminal | |
| 11 | ..1. .... | X'20' | Abend any task attached to TCTTE | |
| 12 | ...1 .... | X'10' | Cancel any task attached to TCTTE | |
| 13 | .... 1... | X'08' | Good Morning message to be sent | |
| 14 | .... .1.. | X'04' | Purge any BMS pages for this TCTTE | |
| 15 | .... ..1. | X'02' | SIMLOGON required | |
| 17 | TWAOPT3 | 1... .... | X'80' | Set INTLOG now allowed |
| 18 | .1.. .... | X'40' | Set no internal general logons | |
| 20 | ...1 .... | X'10' | Normal CLSDST (no reset allowed) | |
| 21 | .... 1... | X'08' | Normal CLSDST (reset allowed) | |
| 22 | .... .1.. | X'04' | Send negative response | |
| 23 | .... ..1. | X'02' | AOS - keep node out of service | |
| 24 | .... ...1 | X'01' | CLSDST node |