Omron CVM1-CLK21, Operation Manual

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Checking Data Link Status Section 5-4
Note a) N: Unit number
b) Only status for nodes 1 to 6 are saved.
5-4-3 Checking by Manipulating Bit/Word Status
After you have confirmed that the data link function is operating normally,
check to see whether or not the data link is operating as intended, i.e., check
to see if the desired bits/words data is being transferred to the intended words
at other nodes.
Although the data link function itself may be operating correctly, the data link
areas may have been input incorrectly.
Change the contents of a bit or word in a data link send area using a Program-
ming Device or the user program and check whether the change is reflected in
data link areas of other nodes as intended.
Note Do not restart the polling node of the Controller Link Network while data links
are active. Otherwise, the data links may stop.
5-4-4 Error Detection Program Example
When the source node's data link is participating, the AND condition of the
data link status for each node can be taken using the Data Link Participation
Flag and the Communications Error Flag, and the error output.
Manual CS/CJ-series PC Specify in the data
link tables 16 words in the following
ranges
CIO: 0 to 6640
LR: 0 to 184
DM: 0 to 32752
EM: 0 to 32752 CIO 1500 + 25
×
N + 7 to 22
C200HX/HG/HE
Level 0 16 words in the following
ranges
IR: 0 to 220
IR: 300
496
LR: 0 to 48
DM: 0 to 5984
EM: 0 to 6128
IR 239 to IR 241 (see note b))
C200HX/HG/HE
Level 1 IR 243 to IR 245 (see note b))
CVM1 or CV-
series PC 16 words in the following
ranges
CIO: 0 to 2540
LR: 0 to 184
DM: 0 to 24560
EM: 0 to 32750 CIO 1500 + 25
×
N + 7 to 22
CQM1H-series
PC 16 words in the following
ranges
IR: 0 to 232
LR: 0 to 48
DM: 0 to 5984
EM: 0 to 6128 IR 91 to IR 93 (see note b))
Data link
mode
PC and
operating level
First data link
status word
Setting range Default status
Local node
Data Link
Participation Flag Node 1
Data Link Participating Flag Node 1
Communications Error Flag
Node 1
Error output
Node 2
Error output
Node 32
Error output
Node 2
Data Link Participating Flag
Node 32
Data Link Participating Flag
Node 2
Communications Error Flag
Node 32
Communications Error Flag