2. HOST COMMUNICATION
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IMR02F04-E1
2.4 Communication Requirements
Processing times during data send/receive
When the host computer is using either the polling or selecting procedure for communication, the
following processing times are required for PG500 to send data:
- Response wait time after PG500 sends BCC in polling procedure
- Response wait time after PG500 sends ACK or NAK in selecting procedure
Response send time is time when interval time is set at 0 ms.
RKC communication (Polling procedure) processing times
Procedure details
Time
Response send time after PG500 receives ENQ
3 ms max.
Response send time after PG500 receives ACK
3 ms max.
Response send time after PG500 receives NAK
3 ms max.
Response send time after PG500 sends BCC
1 ms max.
RKC communication (Selecting procedure) processing times
Procedure details
Time
Response send time after PG500 receives BCC
34 ms max.
Response wait time after PG500 sends ACK
1 ms max.
Response wait time after PG500 sends NAK
1 ms max.
Modbus processing times
Procedure details
Time
Read holding registers [03H]
Response send time after the slave receives the query message
360 ms max.
Preset single register [06H]
Response send time after the slave receives the query message
25 ms max.
Diagnostics (loopback test) [08H]
Response send time after the slave receives the query message
15 ms max.
Preset multiple registers [10H]
Response send time after the slave receives the query message
(When 123 registers are collectively write)
360 ms max.
