Sending Sdo, Nmt And Reading Emergency By Ladder Diagram; The Principle; Structure Of Sdo Request Message - Delta Electronics CANopen Communication Module DVPCOPM-SL Applications Manual

CANopen Communication Module DVPCOPM-SL
Program explanations:
1. The first 3 rows of the program set up the communication format between DVP-SA and IFD9503,
which is 115,200bps, 7E1-ASCII; communication port is COM2.
2. When M0 = On, send the input status of X20 ~ X28 on DVP-08ST to D256, and send the data in b0 ~
b15 of D0 to M10 ~ M25.
3. When D0 = 1, M10 will be On, and Y0 on DVP-SA MPU will output.
5

Sending SDO, NMT and Reading Emergency by Ladder Diagram

5.1

The Principle

See the chart below for sending SDO by WPL program:
SDO request message from master
A: DVP-SV sends out request message to DVPCOPM-SL (master).
B: DVPCOPM-SL (master) sends out request message to the target equipment.
C: The target equipment processes the request message and sends the response message to
DVPCOPM-SL.
D: DVP-SV receives SDO, NMT and Emergency data.
5.2

Structure of SDO Request Message

You can edit SDO, NMT and Emergency in "request message editing area". Take the first DVPCOPM-SL
master placed on the left hand side of DVP-SV for example. See the table below for the corresponding releation
between "request message editing area" and "response message editing area" and the devices in PLC.
20
D
DVPCOPM-SL
B
IFD9503
VFD-B
SDO request message
(PLC -> COPM)
SDO response message
(COPM -> PLC)
DVPCOPM DVP28SV
RUN
STOP
DVP28SV
SDO response message from slave
C
A
DVP-PLC Application Manual