Dear All,
I would liket to ask for your help.
I have a L73S PLC which communicates with a Soft Siemens PLC by MSG. (I already got the system that construction) I use AOI for that, and it looks working well.
BUT, sometimes I notice an anomaly in the communication.
For example: Soft PLC send a constant vaule (30) to the L73S, the L73S interprets the sent data as 30, but sometime it changes to 0, then to 256, and then again to 30. That anomaly width (30-0-256-30) is maximum 150ms.
I made a trend in the soft PLC, but when the anomaly occured the trend show 30 continuously in the soft PLC. In the L73S the trend show the value changing at the same time.
The block does not indicate an error in the communication.
Do you have any idea what could be causing this error?
I would liket to ask for your help.
I have a L73S PLC which communicates with a Soft Siemens PLC by MSG. (I already got the system that construction) I use AOI for that, and it looks working well.
BUT, sometimes I notice an anomaly in the communication.
For example: Soft PLC send a constant vaule (30) to the L73S, the L73S interprets the sent data as 30, but sometime it changes to 0, then to 256, and then again to 30. That anomaly width (30-0-256-30) is maximum 150ms.
I made a trend in the soft PLC, but when the anomaly occured the trend show 30 continuously in the soft PLC. In the L73S the trend show the value changing at the same time.
The block does not indicate an error in the communication.
Do you have any idea what could be causing this error?
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