Devices and logical units that operate with MFS

In addition to 3270 devices, MFS operates with the 3600 and 4700 Finance Communication System (FIN), the 3770 Data Communication System, the 3790 Communication System, and with Secondary Logical Unit (SLU) types 1, 2, 6, and P. Network Terminal Option (NTO) devices are supported as secondary logical unit type 1 consoles.

The following table shows which devices or logical units can be defined for MFS operation in the IMS system by their number (3270, for example), and which can be defined by the type of logical unit to which they are assigned (SLU 1, for example).

Although the 3600 devices are included in the FIN series, you can specify them with their 36xx designations; MFS messages use the FIxx designations regardless of which form of designation you specify. In general, however, application designers and programmers using this information need to know only how the devices they are defining control blocks for have been defined to the IMS system in their installation.

Table 1. Terminal devices that operate with MFS
Device Devices defined by number1 NTO devices2 SLU 1 SLU 2 SLU P LU 6.1
3180 X 3     X 3    
3270 X 3     X 3    
3290 X 3     X 3    
5550 X 3     TYPE: 3270-An 3270-Ann    
3270 printers; 5553, 5557 X 3   COMPTn= MFS-SCS1      
3730         X  
3767     COMPTn= MFS-SCS1      
3770 console, printers, print data set     COMPTn= MFS-SCS1   X  
3770 readers, punches, transmit data set     COMPTn= MFS-SCS2   X  
3790 print data set (bulk)     COMPTn= MFS-SCS1   COMPTn= MFS-SCS1 DPM-An  
3790 transmit data set     COMPTn= MFS-SCS2      
3790 attached 3270       X 3    
6670            
8100         X  
8100 attached 3270     X X 3    
8100 attached Series/1         X  
8100 attached S/32     X      
8100 attached S/34         X  
8100 attached S/38     X      
Finance X       COMPTn= MFS-SCS1 DPM-An  
TTY   X        
3101   X        
Other systems (IMS to IMS or IMS to other)           COMPTn= DPM=Bn
Notes:
  1. With options= (...,MFS,...) in the TERMINAL or TYPE macro.
  2. Defined with UNITYPE= on the TYPE macro and PU= on the TERMINAL macro.
  3. Defaults to operate with MFS.

Logical units are defined by logical unit type or logical unit type with COMPTn= or TYPE= in the TERMINAL macro or ETO logon descriptor. The LU 6.1 definition refers to ISC subsystems.

The definition for SLU 1 can specify an MFS operation with SNA character strings (SCS) 1 or 2. SCS1 designates that messages are sent to a printer or the print data set or received from a keyboard in the 3770 Programmable or 3790 controller disk storage; SCS2 designates that messages are sent to or received from card I/O or a transmit data set.

Terminals defined as SLU 2 have characteristics like the 3270, and like the 3270, can be defined to operate with MFS. In general, a 3290 terminal operates like a 3270 terminal, and references to 3270 terminals in this information are applicable to 3290 devices. However, 3290 partitioning and scrolling support is provided only for 3290 devices defined to IMS as SLU 2.

Generally, the 3180 and 5550 terminals operate like a 3270 terminal, and references to 3270 terminals also apply to these devices. Likewise, the 5553 and 5557 printer devices operate like a 3270P.

Restriction: 5550 Kanji support is provided only for the 5550 terminal defined as an SLU 2 and for the 5553 and 5557 defined as SCS1 printers.

If IMS is to communicate with the user-written remote program in a 3790 or an FIN controller, the device must be defined as an SLU P. Definitions for SLU P must specify MFS operation as either MFS-SCS1 or DPM-An, where DPM means distributed presentation management and An is a user-assigned number (A1 through A15).

Most of the MFS formatting functions currently available to other devices, except specific device formatting, are available to the user-written program. Under user control, these formatting functions (such as paging) can be divided between MFS and the remote program.