As-i – IDEC MicroSmart User Manual
Page 457
28: AS-I
NTERFACE
M
ASTER
C
OMMUNICATION
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Status LEDs
The operation modes of the AS-Interface master module can be changed by pressing the pushbuttons on the front of the
AS-Interface master module or by executing ASI commands. The operation modes can be confirmed on the six status
LEDs on the AS-Interface master module. For details about the ASI commands, see page 28-28.
Status LED Indication
*1: Goes off when AS-Inter face power is not supplied.
*2: Goes on when an error is found on the AS-Inter face bus.
Address LEDs and I/O LEDs
The operating status and I/O status of each slave can be monitored on the address LEDs and I/O LEDs on the front of the
AS-Interface master module.
Slave Operating Status
The operating status of each slave can be determined by viewing the address LEDs and I/O LEDs.
Slave I/O Status
The I/O status of each slave can be monitored on the address LEDs and I/O LEDs. Use the short press to change the slave
address when monitoring slave I/O status on the AS-Interface master module. A short press on PB1 increments the
address. At the last address (31B), another short press will return to the first address (0A). A short press on PB2 decre-
ments the address. At the first address (0A), another short press will return to the last address (31B).
The figures below illustrate what happens when you press the PB1 button while the address LEDs indicate 25A. The
address LEDs increment to 26A where a slave is assigned. Note that the address LEDs flash if no slave is assigned.
Status LED
PWR
FLT
LMO
CMO
OFF
CNF
Connected Mode
Normal Protected Mode
ON
*1
OFF
*2
OFF
ON
OFF
OFF
Normal Protected Offline
ON
*1
ON
OFF
ON
ON
OFF
Normal Protected
Data Exchange Off
ON
*1
ON
OFF
ON
OFF
OFF
Local Mode
Protected Mode
ON
*1
OFF
*2
ON
OFF
OFF
OFF
Configuration Mode
ON
*1
OFF
*2
ON
OFF
OFF
Flash
Address LED
I/O LED
Description
ON
ON or OFF
The slave at this address is active.
ON
Flash
The slave at this address is active, but has an error.
Flash
OFF
This address is not assigned a slave.
OFF
OFF
The AS-Inter face bus communication is disabled because the AS-Inter face power
is not supplied or the AS-Inter face master module is in normal protected offline.
Monitoring Slave Address 25A
Address LEDs are flashing since
no slave is assigned.
Shor t press
on PB1
I/O LEDs
indicate statuses
Monitoring Slave Address 26A
Address LEDs go on and I/O
LEDs indicate the statuses.