Delta DVP-12SE Modbus RTU connection issue with Ignition

Ignition
1

Hello,I am trying to connect my Delta DVP-12SE11T PLC using RS485 with Ignition in the gateway.

I have created the device connection with following properties:

  • Serial Port : COM4

    Bit Rate : 9600

    Data Bits : 7

    Parity : Even

    Stop Bits : 1

  • Transfer Mode : ASCII

In PLC there is a simple on off program with M0(NO),M1(NC),M2(NO) memory bits and Y0,Y1 output bits. In order to see the tags(Boolean) in ignition designer for this connection what OPC Item Path should be used. I have tried but didn’t get any data.

However, in modscan64 the M2 bit which has the address 02051 shows to be 1 and also the corresponding output of this Y0 at address 01281 also shows 1.

Also,with the same device when i connected using Modbus TCP protocol everything work fine
with M0 at C2049,M1 at C2050,M2 at C2051,Y0 at 1281,Y1 at 1282.

Help me to configure the OPC Item Path for Modbus RTU.

IMG_20260108_160549919_HDR_AE (1)
IMG_20260108_160549919_HDR_AE (1)1920×2560 912 KB

IMG_20260108_142642266_HDR_AE
IMG_20260108_142642266_HDR_AE1920×1440 542 KB

IMG_20260108_160453980_HDR_AE
IMG_20260108_160453980_HDR_AE1920×1440 531 KB

2

What OPC Item Paths have you tried?

I would expect something like [MyDevice]1.C2049 to work if it worked similarly on Modbus TCP, assuming your serial settings are correct.

Speaking of... "Transfer Mode" being "ASCII" is probably wrong... is there an "RTU" option?

1 Like
3

Neither my driver nor Kevin's native driver support ASCII transfer mode. You must use RTU with 8-bit symbols.