Chapter 6. COMMREQ/Data_Init_Comm Programming
GFK-2892F
March 2019
73
COMMREQ #19: Read Identification
To read the identification data from a Genius device and place it in PLC CPU memory, use the Read
Identification command. This causes the Gateway to issue a Read Identification datagram. When the data is
received from the target Genius device, via a Read Identification Reply Datagram, it will automatically be
placed in the CPU memory location specified in the Command Block.
Command Block for the Read Identification 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
19
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.
A9
Deposit Memory length.
(either bits or words)
This entry tells the CPU how much memory is being allocated to store the
identification data returned by the Genius device.
Enter 6 for word memory types or 96 for bit memory types (depends on
the memory type selected as the Deposit Memory type below).
A10
Deposit Memory type
Enter the code representing the CPU Memory Type where the GCG will
deposit the data obtained from the target Genius Device. Use the same
codes as in 2.
A11
A12
Memory offset
bytes 1, 2
bytes 3, 4
Starting address within the Deposit Memory type.
(Byte 4 is MSB, Byte 1 is LSB)
