Terminal and user states

Several terminal and user states render the terminal or user inoperable.

The states in which a terminal is inoperable include:
Stop State
The stopped state prevents the delivery of any output queued on a logical terminal that is associated with a physical terminal.

The /STOP NODE command results in the termination of the session between IMS and the node. This termination occurs immediately for most devices but only at the end of the message for 3270 devices and SLU 2 devices. The /STOP NODE command also prevents a new session until a /START command or /RSTART command is issued.

The /STOP command, the /PSTOP command, and the /MONITOR command also cause a terminal to enter the stopped state. This state is reset by the /START command or /RSTART command. The /STOP NODE or USER command allows ETO users to retain their status after signoff or logoff.

QERROR State
A logical terminal is placed in a stopped state if an I/O error is encountered while attempting to read from or write to a message queue. This condition is reset when the MTO operator issues a /START command.
QLOCK State
A logical terminal is prevented from sending any additional output until the locked state is reset by a specific request received in the LU 6.1 session. The LTERM is also prevented from receiving input that might create additional output. This condition is reset when the MTO issues a /START command. A /PSTOP or /PURGE command is ignored for LTERMs that are in QLOCK state.
INOP State
The physical terminal is considered inoperable by IMS device support whenever an error is detected and put in the INOP state. All logical terminals associated with this physical terminal are also considered inoperable. The /START or /RSTART command resets the inoperable condition.
COMPINOP State
Component inoperative can be set in one of two ways:
  • When an error is detected that is isolated to a component of the terminal
  • When the /COMPT or /RCOMPT command is issued for terminals that are defined to VTAM®

All logical terminals associated with this component are ineligible for message output. The component inoperative state is reset when the operator issues a /START LINE PTERM command, a /START NODE command, another /COMPT command, or a /RCOMPT command. Special signals from the device, such as device end from a 3270 device or the component available status from a SLU 1 can also cause a reset.

PAGE, SCREEN, and COMPONENT PROTECTION State
This is a state supported for video terminals, SLU P, Finance, and LU 6.1 devices. Logical terminals associated with these physical terminals are not eligible for output selection.
SNA QUIESCE State
When IMS sends output messages to a VTAM programmable node and the node wants to stop receiving, the node signals IMS to stop transmissions after an end-of-chain has been sent. IMS does not send any more output to the terminal until the terminal sends the SNA release-quiesce (RELQ) command.