Altering the sequence of operations from an RJE workstation

JES2 provides two parameters that allow the RJE workstation operator to control the sequence of operations at the RJE workstation. One parameter (SUSPEND) allows JES2 to interrupt job output processing, while the other (WAITIME) causes JES2 to wait until it is between print or punch processing. For transmitting either jobs or JES2 commands to the JES2 member that is attached to this RJE workstation, a remote operator can specify:

The WAITIME= parameter on the $T RMT(nnnn) command
The SUSPEND= parameter on either the $T R(nnnnn).PR(m) command or the $T R(nnnnn).PU(m) command

The delay time specified on the WAITIME= parameter takes effect between printing or punching the output of each job. This delay gives the operator the opportunity to ready the card reader and change the terminal status to transmit data. JES2 reads the input stream before resuming printing or punching.

When each BSC hardware terminal printer or punch is defined with SUSPEND=YES on either the R(nnnnn).PR(m) statement, the $T R(nnnnn).PR(m) command, the R(nnnnn).PU(m) statement, or the $T R(nnnnn).PU(m) command, you can interrupt the printing or punching of jobs by stopping the output device. When the device is again readied by the operator (after transmitting jobs or JES2 commands to the JES2 member), JES2:

Simulates an interrupt situation by flushing its current I/O buffers and printing the remote separator page, if one exists.
Determines whether the remote card reader is ready.
If the remote card reader is ready, input is read in. If it is not ready, the highest priority output is selected. This output can be the resumption of the current operation or the start of another data set. The delay must be sufficiently long for the terminal to notify JES2 of the stopped device state. (The time depends on the terminal type.)

If SUSPEND=NO on the remote device, JES2 resumes the current operation after the device is readied again.

For both multileaving terminals and SNA devices, JES2 ignores the SUSPEND= parameter on the R(nnnnn).PR(m) and R(nnnnn).PU(m) statements; both input and output operations can occur at the same time. For SNA remote devices, operations are not suspended automatically on a time interval. For example, an operator can suspend a data stream being sent to an RJE workstation by issuing the JES2 $I (interrupt) command.