GE Fanuc Write Register to Modbus Device

sjohnson · Nov 6, 2012

Ill try to make this simple.
How would i write a 0 into register 3051 in a Modbus Device. and a 1 into 3012. I have astablished Communications and Can read my selective registers. I need to write a 0 into register 3051 and a 1 into register 3012. In the block move it doesnt have what to write. Do I need to do another BLKMOV to write a zero after..Thanks..

sthompson · Nov 6, 2012

I wasn't able to open your Word Documents.

However, I don't believe you can Write Data to a 3000 Input Register. I believe they are Read Only.

Stu....

sjohnson · Nov 7, 2012

Stu thanks for the Reply. According to the manual and support from Schneider they are a Write. it would actually be 43051 and 43012. I can see in my gateway that it does write with the blockmov but i need to write a 0 and a 1 in 3012. I do see the write messages and the reply message. I will re submit my docs. thanks. Page 34 of this pdf shows configuration parameters.
http://www.powerlogic.com/literature/3720_IC_Installation.pdf
It worked with the old PCM module but I am converting it to Modbus TCP. so the program structure is a little different.

I is a noob · Nov 7, 2012

What model plc are you using. It will make a different.

sjohnson · Nov 7, 2012

GE Fanuc 90-30 IC693CPU350 With IC693CMM321 Ethernet module And tsxetg100 Gateway.

sjohnson · Nov 7, 2012

I seemed to find it out after reading it GFK-1541b 101 times. Move what you want to write into Register IN4 works for 16bit but i need it for 32bit and brings back 8890 in the error codes tried different lengths and doesnt change.

Steve Bailey · Nov 7, 2012

To write 32 bits of data, the value at IN6 of the second BLKMOV will need to be 2. Also, you'll need to make sure that %R701 is cleared. Each %R adddress in GE is 16 bits, so when you want a 32 bit word at %R700 you will actually be using R%700 and %R701

sthompson · Nov 7, 2012

sjohnson said:
Stu thanks for the Reply. According to the manual and support from Schneider they are a Write. it would actually be 43051 and 43012. I can see in my gateway that it does write with the blockmov but i need to write a 0 and a 1 in 3012. I do see the write messages and the reply message. I will re submit my docs. thanks. Page 34 of this pdf shows configuration parameters.
http://www.powerlogic.com/literature/3720_IC_Installation.pdf
It worked with the old PCM module but I am converting it to Modbus TCP. so the program structure is a little different.

Ah, the 4 Prefix is important, that makes it a Holding Register. The 3 Prefix makes it an Input Register. A very important difference with Modbus.

There is no Page 34 on the PowerLogic Link you Posted, it appears to be EPROM Installation Instructions. I was able open your Word Documents though.

Stu....

sjohnson · Nov 8, 2012

Thanks for all the input.
Thanks Steve for steering me in the right direction. But what didn't help was the material in which I had to use. The meter I had was for a 3300 ACM the manual Schneider sent was for a 3720 ACM and in that manual was the register mapping and other helpful things that did apply to my meter also. So on to my solution. As Steve stated I needed a 2 at IN6 of my BLKMOV #2 but it didn’t work still and when Steve Said the length of 2 for the Variable it was a 1 I put a 2 in the move int and it still returned a 8890 in the status bit. Looking at the Variable Properties Array Dimension I put a 2 and everything worked fine then. Thanks again for all the input it is greatly appreciated.

GE Fanuc Write Register to Modbus Device

sjohnson

Lifetime Supporting Member

sthompson

Lifetime Supporting Member + Moderator

sjohnson

Lifetime Supporting Member

I is a noob

Member

sjohnson

Lifetime Supporting Member

sjohnson

Lifetime Supporting Member

Steve Bailey

Lifetime Supporting Member + Moderator

sthompson

Lifetime Supporting Member + Moderator

sjohnson

Lifetime Supporting Member

Similar Topics