!"
9;;
User action: Use the DEVICENET command to check that DeviceNet is active
and that all critical devices are on-line. Check your DeviceNet
cabling and the individual devices. If you have intentionally
removed this device, use the CONFIG_C utility to remove this
device or mark it as not critical.
*Device not ready*
(–508)
Explanation: (1) The requested disk device (or remote network task) is not pre-
pared to communicate with the V
+
system.
(2) A limited-access device like the terminal, the manual control
pendant, or a serial line is attached to a different program task.
(3) You have tried to write into a pull-down window while it is dis-
played.
User action: (1) If the intended device is a system microfloppy disk drive, make
sure the diskette is correctly inserted and formatted.
(2) If a limited-access device is specified, ABORT and KILL the pro-
gram task that has it attached, or wait for the program task to
release the device. If the intended device is on the network, check
that the proper connections are made and that the remote system is
operating correctly. (2) ABORT and KILL the program task that has
the device attached, or wait for the task to release the device.
(3) The pull-down menu should not be modified with the FSET
instruction while it is being displayed. A suitable time for modify-
ing the pull-down menu is immediately after receiving a
menu-selection event.
*Device reset*
(–663)
Explanation: The device is busy processing a reset operation. The reset could
have been requested (with a SETDEVICE instruction) by another
program task that is accessing the device, or the device could have
initiated the reset on its own.
User action: Use software interlocks to prevent a second program task from
accessing the device after a reset operation has been requested.
(Note that the requesting SETDEVICE instruction will wait for the
reset to complete.) Refer to the documentation for the specific device
for information on its self-generated resets.
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