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Omron CQM1H-CLK21 User Manual

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47

Component Names and Functions

Section 3-1

Wired Unit Indicators

Note Even when the local node does not participate in the data link, the M/

A indicator will be lit if there are manually set data links active on the
network.

For details, refer to

9-1 Troubleshooting Using Indicators

.

Name

Color

Status

Meaning

RUN
(operating)

Green

Lit

Unit operating normally.

Not lit

Unit error.

TER
(terminating resis-
tance)

Yellow

Lit

Terminating resistance switch is ON.

Not lit

Terminating resistance switch is OFF.

ERC (communica-
tions error)

Red

Lit

Communications error, node address
setting error (same address set twice), or
hardware error.

Not lit

Normal operation

ERH
(PLC error)

Red

Lit

PLC error, PLC interface error, EEPROM
error, unit number error, or I/O table not
set

Not lit

No error.

INS
(network participa-
tion)

Yellow

Lit

Unit is participating (inserted) in the net-
work.

Not lit

Unit is not participating (inserted) in the
network.

SD
(send)

Yellow

Lit

Data transmission.

Not lit

No data transmission.

RD
(receive)

Yellow

Lit

Data reception.

Not lit

No data reception.

M/A
(data link mode)

Yellow

Lit

Manual
(see note)

Note:
M/A is always not lit
when data links are not
active in the network.

Not lit

Automatic

LNK
(data link)

Yellow

Lit

Data links participating.

Flashing

Error in data link table.

Not lit

Not in a data link or data link inactive.

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