Calling a hot writer

When you call the hot writer, you can specify parameters that allow you to control the writer during its activity and to change parameters that are currently in effect. By specifying one or more appropriate parameters at the time you enter the *CALL,WTR command, you can:

Suspend writer output until a specific device becomes available
End the writer if the device is unavailable
Control the forms, band or train, or carriage tape to be used
Control AFP printer specifications
Create header and burst records
Specify the writer-selection characteristics to be used and their order
Specify output classes for this writer
Specify the maximum or minimum number of lines or pages allowed per data set for this writer
Specify the number of seconds that should elapse or pages that should be written before a checkpoint is taken
Specify the diagnostic mode
Stop the writer between data sets

Certain parameters such as forms, train (or band), or carriage tape not specified when you enter the *CALL,WTR command either are assumed from default values established by the system programmer or are in effect from the last time the device was active.

You can use the *INQUIRY,D command to display the current status of an output device as discussed previously under Displaying output writer device characteristics. Additional information about default values can be provided by the system programmer.

Do not attempt to use the *CALL,WTR command, if, once having used it, you decide to change additional parameters or if you are instructed to reenter the command because of an error. JES3 will attempt to allocate another device. Parameters can be changed at the time the writer is started with a *START,devname command.