Checking The Pc Link's Operating Conditions - Omron SYSMAC CVM1 Series Operation Manual

Checking the PC Link's Operating Conditions

4-2 Checking the PC Link's Operating Conditions
LED Indicators
CVM1-LK401 Indicators
Turn ON the power supplies to all PLCs in the PC Link system and check the
status of the PC Link Units' LED Indicators with the PLCs in PROGRAM
mode.
LK401
RUN
ERC ERH
THIS
LINK0 OTHER
Meaning of the CVM1-LK401 LED Indicators
Name Color
RUN Green Lit
(Run)
ERC Red
(Communications
error)
ERH Red
(PLC error)
LINK0 Yellow Lit
(Node 0/Polling
node link)
THIS Yellow Lit
(Local Unit link)
OTHER Yellow Lit
(Other Unit link)
Status
The Unit is operating normally. (Lit after initial-
ization is completed.)
Not lit Unit error
Lit A hardware error or node address setting
error occurred. (See note.)
Flashing A link error occurred with the polling node
link, Local Unit link, or Other Unit link.
Not lit The Unit is communicating normally.
Lit An error occurred in the PLC, such as a CPU
Unit error, PLC interface error, EEPROM
error, unit number setting error, or I/O table
setting error.
Not lit There are no errors in the CPU Unit.
Normal status, link established with Node 0
(polling node)
Not lit Error status, link not established with Node 0
(polling node)
Normal status, link established with local Unit
Not lit Error status, link not established with local
Unit
Normal status, link established with other Unit
Not lit Error status, link not established with other
Unit
Section 4-2
Unit status
65