Delta AS Series Programming Manual page 997

AS Ser ies Pro gra mm in g M anu al
5. When the instruction is enabled, only the appointed communication number of the data exchange table will be
executed. When the communication is done and the slave device reponses with OK, the OK flag will be ON. The
corresponding SM of the communication number will be ON and the Error Code is recorded as 0.
6. Before executing this instruction, the system checks if the communication number to be executed is in cyclic
communication mode. If yes, this instruction will not be executed. The Error flag is ON. Error Code is recorded as 2.
7. Refer to the following table for more details when any of the Error flag is ON.
Error Code
0
1
2
3
4
5
6
7
8. The communication timeout is set in the data exchange table.
9. This instruction is suggested for applications where the slave device is better not to receive or be sent with
communication requests regularly. Since only one communication will be opened during the instruction execution,
you need to close the instruciton to start another communication if the same communicaitron port is being used.
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10. There is no limit on the number of times you execute the instruction but only one communication can be
established for each communication port. If you execute the insturcion again when the same comunicaiton port is
being used, the Error flag will be ON and the Error Code is recorded as 5.
Example:
When M0 is ON, the instruction starts to execute the number four communication of the data exchange table in COM1.
The data exchange table of COM1
6 - 7 1 8
No error or the transmission is complete.
The data exchange table or the communication number does NOT exist.
The connection of the data exchange table is started; do NOT start another connection again.
No response from the slaves.
Slave responds with a communication error.
The same communication port is in use.
The communication port does NOT exist or the communication card (AS-F232/422/485) is
NOT installed. .
The communication number of the data exchange table exceeds the setting rang (1~32).
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