Related Special Auxiliary Relays And Special Data Registers - Delta Electronics AH500 Operation Manual

11.1.4 Related Special Auxiliary Relays and Special Data Registers

1. Descriptions of the related special auxiliary relays:
Device
Enabling the function of executing a
SM1584
PLC Link
Connecting to the slave stations
SM1585
automatically/manually
Executing a PLC Link in the
SM1586
automatic mode
Executing a PLC Link in the manual
SM1587
mode
Enabling the function of detecting
SM1588
the slave stations automatically
SM1589 PLC Link error flag
SM1590 A device address is incorrect.
SM1591 Timeout
The number of polling cycles in a
SM1592
PLC link is incorrect.
Standard MODBUS communication
SM1593 protocol/AH500 MODBUS
communication protocol
Name R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R/W
C h a p t e r 11 C o n v e n i e n t F u n c t i o n s
Description
Executing a PLC Link
OFF: The function of executing a PLC Link
is disabled. (Default)
ON: The function of executing a PLC Link
is enabled.
Using user-defined PLC Link flags
OFF: The user-defined PLC Link flags are
not used.
ON: The user-define PLC Link flags are
used.
PLC Link in the automatic
OFF: Not executing a PLC Link in the
automatic mode (Default)
ON: Executing a PLC Link in the automatic
mode
PLC Link in the manual mode
OFF: Not executing a PLC Link in the
manual mode (Default)
ON: Executing a PLC Link in the manual
mode
Detecting the slave stations
OFF: The master does not detect the
slaves.
ON: The master station detects the slave
stations.
If SM1586 and SM1587 are ON, SM1589
will be ON.
OFF: No error occurs.
ON: An error occurs.
If a device address is incorrect, SM1590 will
be ON.
OFF: A device address is incorrect.
ON: No device address is incorrect.
If there is a communication timeout, SM1591
will be ON.
OFF: There is no communication timeout.
ON: There is a communication timeout.
If the value in SR1338 is 0, SM1592 will be
ON.
OFF: The number of times the master station
polls the slave station is correct.
ON: The number of times the master station
polls the slave stations is incorrect.
Selecting a communication protocol
OFF: Standard MODBUS communication
protocol (Default)
ON: AH500 MODBUS communication
protocol
*1
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