Commreq Command Block Contents - GE GFK-2892F User Manual

Chapter 6. COMMREQ/Data_Init_Comm Programming

COMMREQ Command Block Contents

Each field in the Command Block is described below:
Data Field
Data Block Length
Wait/No Wait Flag
Status Pointer Memory
Type
Status Pointer Offset
Idle Timeout Value (ms)
Max. Communication
Time (ms)
Data Block
52
Explanation
This is the amount of data from [address + 6] to the end of the Command Block.
Each type of COMMREQ command has a unique Data Block. See Section 6.4.
This must be set to zero, indicating No Wait.
The Status Pointer Memory Type and Status Pointer Offset defined below
combine to identify the location in CPU Memory of the Status Block associated
with this COMMREQ.
The Status Block is the location to which the COMMREQ will return its status. If one
of the bit–oriented memories (%I or %Q) is used as the Status Block location, those
bits can be monitored by the PLC program.
The Memory Type used is defined by [address + 2], as follows:
Memory Type
%I
%Q
%R
%AI
%AQ
%W
The offset into the Memory Type (above) is defined by [address + 3].
Note that the offset is 0–based. For example, if the Status Block were located at
%R099, memory type would be specified as 08 (for %R memory) and the offset
would be entered as 98 so as to point to %R099.
Note that if a bit–oriented memory (%I or %Q) is specified, a byte boundary must
be used for the offset.
This field is not used for the No Wait mode of communication.
This field is not used for the No Wait mode of communication.
The Data Block contains the parameters of the command. Complete descriptions of
all commands appear later in this chapter (see Section 6.4).
Location
address + 6
address + 7
address + 8
thru address + 78
PACSystems RX3i Genius Communications Gateway
Description Required Entry
discrete input table 70
discrete output table 72
register memory 8
analog input table 10
analog output table 12
Bulk Memory 196
Function
Command Number (see Section 6.3.2)
PROFINET Device Number (1-255) of the targeted Genius
Gateway.
Targeted Genius Device Number (0-31). The serial bus
address (SBA) of the Genius device connected to the
targeted Genius Gateway.
Parameters of the specific Command Number (see
following sections in this chapter).
GFK-2892F