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Omron CQM1H-CLK21 User Manual

Page 306

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283

Troubleshooting Using Indicators

Section 9-1

Configuring a Network with 32 Nodes or Less

9-1-2

C200HX/HG/HE and CQM1H-series Controller Link Units

Troubleshooting with RUN, ERC, ERH and INS Indicators

The RUN, ERC, ERH, and INS indicators can be used to check whether Con-
troller Link Unit startup and Network participation are operating normally.

Note Be sure to turn off the power to the PLC before performing any of the follow-

ing.

• Disconnecting the Unit or connectors.

• Securing Units or connectors.

• Setting hardware switches.

Problem

Status

Cause and Remedy

The node is not
present in the net-
work.
(ERC indicator: ON
RUN indicator: OFF
INS indicator: OFF)

The node with the
ERC indicator ON is
set to a node
address of 33 or
higher.

Reset the node address between 1 and
32, then turn the power OFF and ON
again.

The maximum num-
ber of nodes in the
network is set to 62.

A CS1W-CLK21-V1
or CJ1W-CLK21-V1
is present in the net-
work.

The Wired Network 62 Node Enable Bit
in the DM Parameters Area of the
CS1W-CLK21-V1 or CJ1W-CLK-V1 is
ON. Turn OFF the Wired Network 62
Node Enable Bit, then turn the power
supply OFF and ON again.

The data link status
is showing statuses
for 62 nodes.

The corresponding
node is a CS1W-
CLK21-V1 or CJ1W-
CLK21-V1.

The network partici-
pation status is
showing statuses for
62 nodes.

RUN: Operating
ERC: Communications

error

INS: Network

participation

LNK: Data

link

M/A: Data

link

mode

TER:

Terminating resistance set

RUN
ERC
INS
SD

RD

M/A
LNK

TER
ERH

CLK21

CQM1H-series Unit

C200HX/HG/HE Unit

RUN
ERC
INS
SD

RD

M/A
LNK

TER
ERH

CLK21

Indicators

Probable cause

Probable remedy

RUN

ERC

ERH

INS

Lit

Not lit Not lit Lit

Unit operating normally;
Network participation nor-
mal.

---

Not lit Lit

---

---

Controller Link Unit faulty.

If the ERC indicators still
lights when the Unit is
mounted on another PLC,
replace the Controller Link
Unit.

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