Timeout Processing - Fuji Electric FRENIC-AQUA series User Manual

2) Preset single register, preset multiple registers, force single coil, and force multiple coils
Data count
1
2
3
4
n
If the data is written in H03=1, the inverter processing time is a maximum of 5 seconds. If the
data is written in H03=2 or in P02, the processing time is a maximum of 500 (ms).
3) Maintenance code: 10 (ms)
t2: Receiving preparation time
See Section 3.2.3 "Receiving preparation complete time and message timing from the host."
3.2.2

Timeout processing

To read/write data from/to the host, transmit the next frame after confirming response. If
response is not transmitted from the inverter for more than a specified period of time (timeout
time), it is a timeout, and perform a retry. (If a retry begins before a timeout time elapses, the
requested frame cannot be received properly.)
The timeout time must be set longer than the response time of the inverter. In case of a timeout,
retransmit the same frame or read details of the error (M26) to confirm whether the inverter
sends back normal response. If normal response is returned, this indicates that some transient
transmission error occurred due to noise or for other reasons, and subsequent communications
is normal. (However, if this phenomenon frequently occurs even when normal response is sent
back, some problem may exist. Perform a close investigation.) In case of no response, perform
another retry. If the number of retries exceeds the set value (generally about three times), there
may be a problem with the hardware and the software of the host. Investigate and correct the
cause.
Query
Table 3.11 Inverter processing time
Inverter processing time (minimum to maximum)
Timeout time
Response
Inverter's response time
3-14
25 to 30 (ms)
45 to 50 (ms)
65 to 70 (ms)
85 to 90 (ms)
n×20+5 to n×20+10 (ms)
Query (retry)