KB Home \| Advanced Search \| News \| Ask Question
ProSoft Knowledge Base

Why are my PLX gateway modbus serial commands not executing despite being enabled?

Article Number: 564 | Rating: Unrated | Last Updated: Thu, Aug 13, 2015 at 10:13 PM

If your modbus serial port and its commands are both enabled, but the commands do not appear to even be executing (status shows no requests are being made, data analyzer shows nothing coming out of the port, etc.) check the value of Command Control Reg. Command Control Reg is located in the port settings and is a special override that allows you to control when your commands execute. If you are not intending to use this feature, but the Command Control Reg value is set to anything but -1, change the value to -1 to disable this feature, and download the updated configuration. Without the CCR to override your commands, you should see them begin to execute as intended.

As always, if this does not fix your issue, call or email your region's Prosoft Technical Support for further troubleshooting assistance.

Custom Fields

Attachments (0)

Attachments

There are no attachments for this article.

Comments

Comments

There are no comments for this article. Be the first to post a comment.

Related Articles

How does the gateway know where to load or store configuration files (SD card or non-volatile RAM)?

Viewed 1 times since Mon, Sep 29, 2014

How can I detect the feedback status of individual command successful or failed?

Viewed 1 times since Wed, Nov 29, 2006

I have multiple Modbus masters that need to communicate with 1 or more Modbus serial (RTU) slave devices. What product should be used??

Viewed 1 times since Tue, Jan 23, 2007

Do any Prosoft modules support Modbus UDP?

Viewed 1 times since Mon, Aug 24, 2015

How do I read/write Modbus binary data?

Viewed 1 times since Wed, Nov 29, 2006

What's the difference between Modbus ASCII and Modbus RTU?

Viewed 1 times since Wed, Mar 19, 2008

I am trying to use a ProSoft Modbus solution to send/receive data to a MSA Ultima X gas dectection system with Modbus interface and am having problems. How can I resolve this issue?

Viewed 1 times since Thu, Apr 24, 2008

I have a ProSoft Modbus Master solution and would like to know, is the Slave Status List the best place to monitor for communications health of the network?

Viewed 1 times since Tue, Mar 18, 2008

What do the jumpers do on the PLX3x gateways?

Viewed 1 times since Mon, Sep 15, 2014

Differences between the PLX31 & PLX32 Gateways

Viewed 1 times since Fri, Jul 10, 2015