Emerson PNC001-A Series User Manual

PACSystems™ RX3i and RSTi-EP CPU Reference Manual Section 6
GFK-2222AK October 2019
Serial I/O, SNP & RTU Protocols 152
6.2.11.1 Example Command Block for the Cancel Operation Function
Value
(decimal)
Value
(hexadecimal)
Meaning
Address
0002
0002
Data block length (2)
Address +1
0000
0000
NOWAIT mode
Address +2
0008
0008
Status word memory type (%R)
Address +3
0000
0000
Status word address minus 1 (%R0001)
Address +4
0000
0000
Not used
Address +5
0000
0000
Not used
Address +6
4399
112F
Cancel operation command
Address +7
0001
0001
Transaction type to cancel
1 - All operations
2 - Read operations
3 - Write operations
6.2.11.2 Operating Notes
Remote COMMREQs that are cancelled due to this command executing will return a
COMMREQ status word indicating request cancellation (minor code 12H).
CAUTION
If this COMMREQ is sent in either Cancel All or Cancel Write mode when a Write Bytes
(4401) COMMREQ is transmitting a string from a serial port, transmission is halted. The
position within the string where the transmission is halted is indeterminate. In addition,
the final character received by the device to which the CPU is sending is also
indeterminate.

Emerson PNC001-A Series Specifications

General

Brand	Emerson
Model	PNC001-A Series
Category	Controller
Language	English