MVI46-MNET
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How do I get Floating-Point values in a PLC5 or SLC processor from the Modbus module?
To view the floating-point value, the two 16-bit integers must be copied to a floating-point variable in the processor. For PLC and SLC processor, a COP command is used, with the source being the first integer value location, the dest being the F file location, and the len being ...
Read moreWhat causes a conditional command to be issued?
A conditional command is useful when the same value does not need to be written to the end device continuously, but rather on change. A conditional write command is scanned based upon its poll rate (like all other commands). The difference is that it will not be execut...
Read moreWhat does a -36 modbus error code indicate?
A negative thirty six (-36) error code is generated when we have successfully connected to a device and issued the device a Modbus request, but it has not responded to the request within the defined response time out period. This is akin to calling some one on the phone, having s...
Read moreWhat is Enron-Daniels mode?
In some of our older Modbus products we had/have a feature called float flag. This feature, which has been renamed to Enron-Daniels mode in most of our newer Modbus products to avoid the misconception that this mode was necessary for accessing floating point values in non-Enron o...
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