1734-232ASC

[seth350 0]

Hello all,

First time ASCII comms and I am currently trying to connect a Point I/O 232ASC card to a Keyence LK-G5000 laser displacement sensor via RS232C port.

Logix5000 v.20.01.00

I have the card and sensor wired as the manual suggests. I have the baud, parity, stop bits, and delimiters set as the manual suggests.

The keyence has a MS,01 [CR] command that is supposed to reply back with the current measured value but when I send this command the only thing that changes is the Receive.Status. It will change from 0 to 16. Receive records does not increment. 

The keyence manual says it only needs the CR delimiter at the end and speaks nothing of a starting delimiter.

In the 232ASC tags, I enter the command like this.
Keyence:4:O.Data[0] - M
Keyence:4:O.Data[1] - S
Keyence:4:O.Data[2] - ,
Keyence:4:O.Data[3] - 0
Keyence:4:O.Data[4] - 1
Keyence:4:O.Data[5] - $r

Length set to 6.

One other thing is the Keyence manual specifies the SD (TXD) pin as an input and the RD (RXD) as an output. So I have it wired as SD->TX and RD->RX.

If anyone could give some advice as to if I have the command and length right, I would appreciate it. Like I said, I am not receiving anything back from the Keyence.

[panic mode 246]

it is unclear if RS232 port of the LK is DTE or DCE device. you have wired it as DCE, try swapping TX and RX

[seth350 0]

Thanks panic,

I did try that and still nothing.

*Edit: I jumped the Tx to Rx on the module and do not recieve anything either.

Edited 19 Mar 2016 by seth350

[seth350 0]

New progress...after fumbling my way through this...

I was not receiving anything with Tx jumped to Rx until I changed the transmit length to 16. Max characters is set to 20. Once I did that I started receiving the command I sent.