Delta AH Series

AH Motion Controller - Operation Manual
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 I/O Refreshing and Communication Service
I/O refreshing
A CPU module reads external I/O data periodically or output data to external I/O. I/O refreshing includes the
following.
 Refreshing data in a digital I/O module
 Refreshing data in an analog I/O module
 Refreshing data in a network module
 Refreshing data in a motion control module
All I/O refreshing is executed in the same loop. The data in an input device is refreshed before a program is
executed, and the data in an output device is refreshed after the program is executed.
Unit
Maximum data exchange
Data exchange area
Digital I/O module
It depends on the number of input/output channels in the unit.
Input relay/Output relay
Analog I/O module
It depends on the number of input/output channels in the unit.
Data register
Network module
It depends on the unit.
Data register
Motion control module
It depends on the unit.
Data register
Communication service
Communication service is nonscheduled communication service of a network module. It includes the
communication request sent from external equipment to a CPU module, and the communication request sent from
the CPU module to the external equipment.