Omron CS1W-CLK12-V1, Operation Manual

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Handling Precautions Section 10-7
Replacing a Unit after
Stopping the System
(Normal Replacement) Typically, the system is shut down as described in the following procedure
before replacing a Unit. It is possible to keep the system operating and turn
OFF just the node where the Unit is being replaced, but several conditions
must be met. Refer to Replacing a Unit while the System is Operating below
for details.
1,2,3... 1. Turn OFF all nodes in the Controller Link Network.
2. Detach the communications cables attached to the Controller Link Unit to
be replaced and remove the Unit.
3. Mount the new Controller Link Unit in the PLC and connect the communi-
cations cables. (Refer to SECTION 3.)
4. Set the unit number, node address, baud rate, and the terminating resis-
tance for the new Unit to the same settings as the previous Unit. (Refer to
SECTION 4.)
5. Turn ON the power to the PLCs at all nodes in the Controller Link Network
other than those for which the Controller Link Unit was replaced.
6. Check that all the other nodes are active and then turn ON the power to the
PLC with the Controller Link Unit that was replaced.
7. Using the Controller Link Support Software, read the network parameters
and make sure the Network is operating normally.
8. If the data links are not activated automatically, start the data links from the
data link startup node.
9. Check that the data links are operating normally by monitoring them from
the Controller Link Support Software.
Replacing a Unit while the
System is Operating
(Except CS1D Systems) If an Optical Ring Controller Link Unit (H-PCF or GI cable) is being replaced,
the Unit can be replaced without turning OFF the other nodes in the network
as long as the following 3 conditions are met simultaneously. There will be no
effect on the network if these conditions are met.
1,2,3... 1. The network must be operating in token-ring mode (transmission format
setting set to token-ring mode) and there must not be a disconnected node
in the network. (See note for the location of the control bit.)
A disconnection can be found by checking the status of the Network Dis-
connection Flag (bit 15 of the ring status in CIO 1523 + (25
×
n)) or moni-
toring the connection status from the Controller Link Support Software
(Ver. 2.00 or later) with the connection configuration information utility.
2. The network must be started with the relevant Controller Link Unit set as a
polled node. (See note for the location of the control bit.)
The replaced Controller Link Unit may become a polling node if the polling
node/polled node control bit specifies it as a polling node. In this case, the
network parameters may change and the data link may stop. (To restore
proper operation, set the network parameters again and restart the data
link.)
3. The application program must be written so that the other nodes will not be
affected by the removal of the node from the network and its reintroduction.
Note The transmission format control bits are bits 8 and 9 and the polling node/
polled node control bit is bit 15 in the following word. (The term “n” is the unit
number.)
CS-series: DM 30000 + (100
×
n)
CVM1 and CV-series: DM 2000 + (100
×
n)
If the 3 conditions listed above are met, it is possible to turn OFF just the node
being replaced and leave the rest of the system operating. Use the following
procedure if the 3 conditions are met.
1,2,3... 1. Turn OFF the backup power supply and the power supply to the PLC con-
taining the Unit that will be replaced.