Memory Allocation - Omron FH series User Manual

Checking the Communications Status
1
Connect the Sensor Controller and PLC Link with an RS-232C/422 cable.
2
If the cable is not connected, check to confirm that the message "PLC Link Error" is
displayed on the Controller.
3
Confirm that the "PLC Link Error" message goes away when the cable is connected.
(At the longest, the message should disappear after the time set as the retry interval.)
If the "PLC Link Error" message does not go away, the PLC Link settings are not correct. Check the following.
• Are the communications settings correct for the connected device?
• Is the cable connected?
• Are all cables wired correctly?
After you have confirmed the communications status as described above, send an actual measurement
command to the Controller and check to confirm that Vision Sensor communications are operating correctly.

Memory Allocation

This section explains allocations for each area including the Command Area, Response Area, and Data Output
Area.
Command Area (PLC to Sensor Controller)
First word in
Command
15
Area
+0
+1
+2
CMD-CODE
+3
+4
+5
+6
+7
+8
+9
CMD-PARAM
+10
+11
+12
+13
+14
+15
Signal
EXE Command Request Bit
DSA Data Output Request Bit
XEXE Flow Command Request Bit
CMD-CODE Command code
CMD-PARAM Command parameters
192
Communicating with PLC Link
14 13 12 11 10
Signal name
Executes a command. Reference:
Requests the next data output. Reference:
cessing Item Registration) (p.184)
Executes a flow command.
Stores the command code.
Stores command parameters.
Bit
9 8 7 6 5 4
XEXE
Function
Vision System FH/FZ5 Series User's Manual
Name
3 2 1 0
EXE Control input
(2 words)
DSA
(Command
code: 2
words)
(Up to 12
words for
command
parameters.)
Command List (p.199)
Output Data Settings (Pro-
for Communications Settings (Z342)