28: AS-INTERFACE MASTER COMMUNICATION
« FC4A MICROSMART USER’S MANUAL » 28-23
Status Information
The status information is allocated to AS-Interface internal relays M1940 through M1997. These internal relays are used to
monitor the status of the AS-Interface bus. If an error occurs on the bus, you can also confirm the error with the status
LEDs on the front of the AS-Interface master module in addition to these status internal relays.
•
Status Information Internal Relays
M1940 Config_OK
M1940 indicates the configuration status. M1940 goes on when the permanent configuration data (PCD) stored in the
AS-Interface master module EEPROM matches the configuration data image (CDI). When configuration is changed, e.g. a
new slave is added or a slave fails, M1940 goes off. Then, the FLT LED goes on.
M1941 LDS.0
M1941 is used to check for the presence of a slave with address 0 on the AS-Interface bus. M1941 goes on when a slave
with address 0 (the factory setting) is detected on the AS-Interface bus in normal protected mode or protected mode, or
when a slave address is changed to 0 while the AS-Interface master module is in normal protected mode.
M1942 Auto_Address_Assign
M1942 indicates that the auto addressing function is enabled. The default setting is “enabled,” and M1942 is normally on.
This setting can be changed using the ASI commands Enable Auto Addressing and Disable Auto Addressing.
Note: When the auto addressing function is enabled at the AS-Interface master module and a slave fails, you can replace
the slave with a new slave which has the same identification codes without stopping the AS-Interface bus.
• If the replacement slave is assigned the same address and has the same identification codes as the failed slave, the
replacement slave is automatically added to the LDS (list of detected slaves) to continue operation. If the assigned
address or the identification codes of the replacement slave are different from the failed slave, the FLT LED will go on.
• When replacing a failed slave with a new slave which is assigned address 0 (factor y setting) and has the same identifica-
tion codes, the new slave will be assigned the address of the failed slave and added to the LDS and LAS (list of active
slaves). If the identification codes of the replacement slave are different from the failed slave, the FLT LED will go on.
• The auto addressing function for a replacement slave works only when one slave has failed. This function cannot be used
to replace multiple slaves.
Internal Relays Status
Description
ON OFF
M1940 Config_OK Configuration is complete. Configuration is incomplete.
M1941 LDS.0
Slave address 0 is detected on
the AS-Interface bus.
Slave address 0 is not detected on
the AS-Interface bus.
M1942 Auto_Address_Assign Auto addressing is enabled. Auto addressing is disabled.
M1943 Auto_Address_Available Auto addressing is ready. Auto addressing is not ready.
M1944 Configuration Configuration mode is enabled. Other than configuration mode.
M1945 Normal_Operation_Active
Normal protected mode is
enabled.
Other than normal protected mode.
M1946 APF/not APO AS-Interface power supply failure. AS-Inter face power supply is normal.
M1947 Offline_Ready
Normal protected offline is
enabled.
Other than normal protected offline.
M1950 Periphery_OK Peripheral devices are normal. Peripheral devices are abnormal.
M1951-M1957 (reserved) — —
M1960 Data_Exchange_Active Data exchange is enabled. Data exchange is prohibited.
M1961 Off-line
Command to go to normal pro-
tected offline was issued by the
pushbutton or WindLDR.
Command to go to normal protected
offline was not issued.
M1962 Connected Mode Connected mode is enabled. Local mode is enabled.
M1963-M1997 (reserved) — —
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