Metalfab SEW Eurodrive MOVIMOT MM..C - Manual (Page 125)

Operating Instructions – MOVIMOT® MM03C - MM3XC
125
9
Function with RS-485 master
Startup with Communications Interface / Fieldbus
Message pro-
cessing in the
MOVILINK
®
mas-
ter
The following algorithm should be observed for sending and receiving MOVILINK
®
mes-
sages in any programmable controller, in order to ensure correct data transmission.
Send request mes-
sage a) Sending request message (e.g. send setpoints to MOVIMOT
®
)
1. Wait for the start pause (minimum 3.44 ms, at least 25 ms with group or broadcast
messages).
2. Send request message to inverter.
Receive response
message b) Receive response message
(receive confirmation + actual values from MOVIMOT
®
)
1. The response message must be received within approx. 100 ms, otherwise it is sent
again.
2. Calculated block check character (BCC) of the response telegram = received BCC?
3. Start delimiter of response message = 1D
hex
?
4. Response address = Request address?
5. Response PDU type = Request PDU type?
6. All criteria satisfied:
→
Transmission OK! Process data valid!
7. The next request telegram can now be sent (continue from point a).
All criteria satisfied:
→
Transmission OK! Process data valid! The next request
message can now be sent (continue from point a).
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I