Panasonic VF100 - Common Precautions on MEWTOCOL-COM and MOD-BUS (RTU); Precautions on Communicating with Host Computer; Processing Time on Inverter; Send;Receive Changeover Wait Time

12-8. Common Precautions on MEWTOCOL-COM and MOD-BUS(RTU)
12-8.1 Send/Receive Changeover Wait Time
In the event that inverter is used for communicating, common precautions on two protocols
MEWTOCOL-COM and MOD-BUS (RTU) are the two points as follows.
Set the wait time to the values larger than the values shown below after the inverter transmits the
response message and before a host computer sends the next data.
0.238400
0.519200
1.09600
2.04800
Wait time (msec)
Communication
speed (bps)
12-8. 2 Processing Time on Inverter
The internal processing time of the inverter differs depending on the operating conditions, however
it is always below 50msec.
In case of setting the parameter "P150: Setting data clear", maximum 2.0sec processing time is
necessary for writing data into the internal memory. When the timeout period is specified on the
host computer, the value which does not give any effect on the system must be set.
12-8. 3 Precautions on Communicating with Host Computer
For inverter is not one party in communication, that internal memory of the inverter is ensured by
host computer, set the connected machine in communication to use the internal memory of the
connected machine.
[Example] When connected with programmable intelligent operation panels GT produced by Panasonic,
basic communication area should be set to "GDT" (word area) and "WGR" (bit area).
Host
computer
Inverter
Transmission
data
Response
data
Processing
time
Send wait
time (P141)
Wait time
Transmission
data
Response
data
Processing
time
Send wait
time (P141)
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