Mitsubishi CS-40507 Instruction Manual download pdf (Page 9)

INTRODUCTION

Diagnostic LED Status Indicator

The green LED located next to the address DIP switch on the Modbus

Plus option top board provides indication of communication status. The

LED on the bottom board will be solid green if the option CPU acts

correctly.

The following describes the LED on the top board definitions.

Table 1

Green State of system

Flash every 160ms

Node is working normally. It is successfully

receiving and passing the network token.

Flash every 1s

Node is in the MONITOR_OFFLINE state. It

monitors the network link every 5 seconds

but is not transmitting.

2 flashes, off 2s

Node is in MAC_IDLE state. This node may

have a bad transmitter.

3 flashes, off 1.7s

Node is not receiving tokens. This indicates

that this node is the only active node on the

network or the receiver is bad.

4 flashes, off 1.4s Duplicate node address seen.

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Mitsubishi CS-40507 Instruction Manual Page 9