User manual

Computer Gateway User Manual 4-32 5/96
4.4.6
4.4.6 ACIDP Execution State Change Request
This message, originated by the host processor, informs the CG of a change of an ACP's
execution state. It does this by requesting a change of the ACP execution state as recorded
in the parameter EXECSTAT of its associated ACIDP. The allowable operations are to
change to RUN state or from RUN to ABORT or to OFF/DELAY. The CG sets the
ACIDP to OFF if its activation type is DEMAND, and to DELAY if the activation type is
PERIODIC, CYCLIC, PERIODIC/DEMAND, or CYCLIC/DEMAND.
Eight-Character Tagname Form
Header information: Word 1—Transaction Code = 21
Word 2—Number of Words = 7
Word 5—CG Identifier = 3
Message format: Words 1..4—ACIDP name (8 ASCII characters)
Word 5—new state (integer) 1=off/delay state
2=abort state
3=run state
Words 6..7—abort code (4 ASCII characters)
Use information: The abort codes are visible at the Universal Station and can have
any value assignments you wish. Presumably they will be coded
to indicate the apparent reason for aborting the ACP/ACIDP.
Abort code of 0000 (ASCII zeros) indicates a normal termination.
The change to RUN state message is required after receipt by the
host processor of a turn-on message. This confirms to the CG
that the ACP has been activated. If the ACP is connected to an
ACIDP, the change to RUN state is required prior to use of any
messages addressed to the ACIDP.
There is no data-message response to this request.
The operator can change the EXESTAT of an ACIDP from
ABORT to OFF/DELAY through the operator-demand function at
the Universal Station.
Sixteen-Character Tagname Form
Header information: Word 1—Transaction Code = 121
Word 2—Number of Words = 16
Word 5—CG Identifier = 3
Message format: Words 1..8—ACIDP name (16 ASCII characters)
Words 9..13—reserved for future use (fill with integer zeros)
Word 14—new state (integer) 1=off/delay state
2=abort state
3=run state
Words 15..16—abort code (4 ASCII characters)