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COMMREQ Differences: Genius Bus Controllers and Genius
Gateway
COMMREQs supported by the Genius Gateway (GCG) are intended to perform the same functions as their
Genius Bus Controller (GBC) counterparts. However, there are four significant differences that break
compatibility with the GBC COMMREQ Command Blocks:
1) GCG COMMREQs require a PROFINET Device Number at Address +7. This value is required to identify
which PROFINET /GCG combination is expected to process the COMMREQ.
2) As a result of (1) above, any COMMREQ command parameters above Address +7 are shifted with
respect to the comparable GBC COMMREQ.
3) SYSID consists of the Rack/Slot location of the PROFINET Controller networked to the targeted GCG
rather than the Rack/Slot location of the GBC.
4) For COMMREQs that return data to CPU memory, e.g., Read Configuration, the Memory Offset field has
been expanded from one to two words. This allows the use of bulk memory (%W) addresses greater
than 65,535. When using offsets less than or equal to 65,535, the more significant offset word must be
zero.
The following table shows all Genius COMMREQs and where they are supported.
COMMREQ#
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
GFK-2892F
Function
1
Pulse Test
2
Read Configuration
3
Write Configuration
4
Read Diagnostics
5
Clear Circuit Fault
6
Clear All Circuit Faults
7
Assign Monitor
8
Outputs Enable/Disable
9
Global Data Enable/Disable
Switch BSM
Read Device
Write Device
De-Queue Datagram
Send Datagram
Request Datagram Reply
I/O Faults Enable/Disable
Do Output
Read Bus Address of Bus Controller
Read Identification
Write Point
Read Block I/O
Read Map
Write Map
Read Data
Write Data
Chapter 6. COMMREQ/Data_Init_Comm Programming
GCG
March 2019
GBC 30
GBC 70
61
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