Commreq #20: Write Point Command; Commreq #21: Read Block I/O Command - Emerson PACSystems RX3i User Manual

User manual
GFK-2892G
6.4.13

COMMREQ #20: Write Point Command

This command is intended for use with legacy devices that use absolute memory
addressing, such as the Series Six. For Series 90 and PACSystems PLCs, use the Write Device
command.
Note that while the GCG001 does support this COMMREQ, the Genius devices which
respond to such a COMMREQ are not currently supported by the GCG001.
Command Block for the Write Point Command
Address
Address +1
Address +2
Address +3
Address +4
Address +5
Address +6
Address +7
Address +8
Address +9
Address +10
Address +11
Address +12
6.4.14

COMMREQ #21: Read Block I/O Command

This command is used to read input and output data from the following Genius blocks:
• 4-Input/2-Output Analog Blocks
• Current-source Analog Blocks
• Thermocouple Input Blocks
The data available to this command includes the I/O data that is part of the block's periodic
I/O update as well as other related data, such as the raw counts.
COMMREQ/Data_Init_Comm Programming
Command Length
No Wait
Status Block memory type
Status Block offset
Idle timeout value
Max. communications time
Command number
PROFINET Device number
Genius Device Number
Target Device Address
bytes 1, 2
bytes 3, 4
AND & OR Masks
for byte 1
AND & OR Masks
for byte 2
7
0
70 (%I), 72 (%Q), 8 (%R), 10 (%AI), 12 (%AQ) or
196 (%W)
Beginning address for the COMMREQ Status
Block.
0
0
20
1-255: The device number of the targeted GCG
Genius Gateway.
0-31: the SBA of the targeted Genius Device to
which data is to be transmitted.
Address within target device to be modified per
the AND & OR masks supplied below. Byte 1 is LSB
of this address, Byte 4 is MSB.
AND mask is in the LSB; OR mask is in the MSB
AND mask is in the LSB; OR mask is in the MSB
Chapter 6
Sep 2019
79