IDEC MicroSmart - Manual (Page 455)

28: AS-I NTERFACE M ASTER C OMMUNICATION
« FC4A M ICRO S MART U SER ’ S M ANUAL » 28-15
AS-Interface Master Module Operation Modes
The AS-Interface master module has two modes of operation: connected mode is used for actual operation, and local mode
is used for maintenance purposes.
Connected Mode
In connected mode, the CPU module communicates with the AS-Interface master module to monitor and control each
slave. Connected mode is comprised of the following three modes.
•
Normal Protected Mode
When the CPU module is powered up, the AS-Interface master module initially enters normal protected mode of con-
nected mode if no error occurs. This is the normal operation mode for the AS-Interface master module to perform data
communication with the connected slaves.
If the configuration data stored in the AS-Interface master module do not match the currently connected slave configura-
tion, the FLT LED on the front of the AS-Interface master module goes on. Execute configuration using the pushbuttons on
the AS-Interface master module. Configuration can also be done using
WindLDR . See page 28-32.
•
Normal Protected Offline
The AS-Interface master module stops communication with all slaves and enables offline operation (initialization of the
master module). In this mode, the CPU module cannot monitor the slave status.
To enter normal protected offline from normal protected mode, either long-press the PB2 button or execute the ASI com-
mand Go to Normal Protected Offline. To return to normal protected mode and resume data communication, either long-
press the PB2 button again or execute the ASI command Go to Normal Protected Mode. For details about the ASI com-
mands, see page 28-28.
•
Normal Protected Data Exchange Off
Data communication with all slaves is prohibited. To enter this mode, execute the ASI command Prohibit Data Exchange.
To return to normal protected mode and resume data communication, execute the ASI command Enable Data Exchange.
For details about the ASI commands, see page 28-28.
When auto configuration or manual configuration is executed on WindLDR , the AS-Interface master module enters this
mode during configuration.
Local Mode
In local mode, the CPU module does not communicate with the AS-Interface master module. Local mode is used to carry
out maintenance operations such as checking the configuration and slave inputs. Use the input LEDs to check the slave
input data during operation.
When the CPU module is powered up, the AS-Interface master module initially enters normal protected mode of con-
nected mode if no error occurs. To switch from any of connected mode to local mode (protected mode), long-press the PB1
and PB2 buttons simultaneously. It is not possible to switch from local mode back to connected mode using the pushbut-
tons. To return to connected mode, shut down the CPU module and power up again.
Local mode is comprised of two modes: protected mode and configuration mode.
•
Protected Mode
This mode operates the slaves in accordance with the slave configuration data stored in the AS-Interface master module. If
the configuration data stored in the AS-Interface master module does not match the currently connected slave configura-
tion, the FLT LED on the front of the AS-Interface master module goes on, and slaves are not operated correctly.
To enter protected mode from any of connected mode, long-press the PB1 and PB2 buttons simultaneously.
•
Configuration Mode
This mode switches all currently connected slaves to active, regardless of the slave configuration data stored in the AS-
Interface master module. To store the current slave configuration data to the AS-Interface master module EEPROM, long
press the PB1 button. This way, configuration is executed.
To enter configuration mode from protected mode, long-press the PB2 button. To return to protected mode, long-press the
PB1 and PB2 buttons simultaneously.