Chapter 6. COMMREQ/Data_Init_Comm Programming
GFK-2892F
March 2019
75
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
Command Length
7
A1
No Wait
0
A2
Status Block memory type
70 (%I), 72 (%Q), 8 (%R), 10 (%AI), 12 (%AQ) or 196 (%W)
A3
Status Block offset
Beginning address for the COMMREQ Status Block.
A4
Idle timeout value
0
A5
Max. communications time
0
A6
Command number
20
A7
PROFINET Device number
1-255: The device number of the targeted GCG Genius Gateway.
A8
Genius Device Number
0-31: the SBA of the targeted Genius Device to which data is to be
transmitted.
A9
A10
Target Device Address
bytes 1, 2
bytes 3, 4
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.
A11
AND & OR Masks
for byte 1
AND mask is in the LSB; OR mask is in the MSB
A12
AND & OR Masks
for byte 2
AND mask is in the LSB; OR mask is in the MSB
