Hello Guys,
I have been trying to study a Machine that have Omron 3g3mv VFDs that is controlled by CJ1m CPU and SCU41-V1 communication card.
The program is written using Protocol macro. I have studied protocol macro for past few days and I have some basic knowledge about it.
I have been trying to replace the 3g3mv VFD with Schneider ATV drive and I am trying to change the protocol macro to be compatible with schneider drive.
I have few questions.
1. You can see that the Message for requesting drive status for Omron VFD here.
And this is the communication traffic generated by above messages.
I have tested the Schneider drive with Modbus and to get the drive status following command has to be send.
01 03 0C 81 00 01 D7 72 Request Drive status from 3201 Register
From this
01 = Drive address,
03 = Read Holding Register,
0C 81= Starting address of the register
00 01 = Number of Registers,
D7 72 = CRC
If I was to implement this to Protocol Macro It should look like this,
But when I download the macro and put the plc on run the output looks like this.
Do you guys have any idea why this is happening.? Am I missing something here?
I have been trying to study a Machine that have Omron 3g3mv VFDs that is controlled by CJ1m CPU and SCU41-V1 communication card.
The program is written using Protocol macro. I have studied protocol macro for past few days and I have some basic knowledge about it.
I have been trying to replace the 3g3mv VFD with Schneider ATV drive and I am trying to change the protocol macro to be compatible with schneider drive.
I have few questions.
1. You can see that the Message for requesting drive status for Omron VFD here.
And this is the communication traffic generated by above messages.
I have tested the Schneider drive with Modbus and to get the drive status following command has to be send.
01 03 0C 81 00 01 D7 72 Request Drive status from 3201 Register
From this
01 = Drive address,
03 = Read Holding Register,
0C 81= Starting address of the register
00 01 = Number of Registers,
D7 72 = CRC
If I was to implement this to Protocol Macro It should look like this,
But when I download the macro and put the plc on run the output looks like this.
Do you guys have any idea why this is happening.? Am I missing something here?
