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(1) Indicator LEDs
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Figure 4.2 Indicator LEDs
Table 4.2 Indicator LEDs
LED
Status
Description
RUN
ON
Normally operating
OFF
Hardware error (watchdog timer error) or power failure
SD/RD
ON
Exchanging I/O data*1 or during acyclic
communications *2
Flashing
OFF
Not communicating with DP-Slave, or being in the
standby system
READY
ON
Ready to communicate or communication being
performed
OFF
Not ready to communicate or no communication
RSP ERR.
ON
A communication error has occurred.
OFF
No communication error
TEST
ON
Executing self-diagnostics or flash ROM initialization
Flashing
Executing self-diagnostics
OFF
Not executing self-diagnostics or flash ROM
initialization
TOKEN
ON
Token being passed*3
Flashing
OFF
No token passing, or being in the standby system*3
PRM SET
ON
Operating in parameter setting mode (mode 1)
Flashing
The written parameters are invalid
OFF
Operating in operation mode other than parameter
setting mode (mode 1)
FAULT
ON
An error has occurred
OFF
Normally operating
