Delta AS Series Programming Manual page 962

communication timeout setting value.
  When receiving of data is complete, the instruction sets the completion flag. You must clear the flag before
receiving more data.
  The instruction is disabled for one cycle after the completion flag is set. Then the instruction can be started in
the next cycle.
6. There is no limit to the number of times the instruction can be executed. The instruction can use only one
communication port for the output and execution of one communication instruction each time. If receiving and
sending data is complete, you must disable the instruction to correctly release the communication control.
7. The instruction cannot be used in the ST programming language, interrupt tasks or function block which is called
only once.
Example of setting the communication protocol:
1. Set the PLC COM1 (RS485) port in HWCONFIG with these values: ASCII, 115200, 8, E, 1
2. Set the servo parameters using the panel on the Delta ASDA-A2 servo according to the following steps.
A. Set P2-08 to 10 to restore the factory settings.
B. Cycle the power on the servo off and then back on.
C. Set P1-01 to 0001 (PR mode).
D. Set P3-00 to 2: the station address of the servo is set to 2.
E. Set P3-01 to 0205: the RS485 baud rate of the servo is set to 115200.
F. Set P3-02 to 0004: the RS485 communication format of the servo is set to 8, E, 1.
G. Cycle the power to the servo again after completing these settings.
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