ProSoft Technology MVI56E-MCMR - Manual (Page 77)

MVI56E-MCMR ♦ ControlLogix Platform Configuring the MVI56E-MCMR Module
Modbus Communication Module with Reduced Data Block User Manual
ProSoft Technology, Inc. Page 77 of 225
May 13, 2014
Write Floats to Slave Device
To issue a Write command to Floating-Point addresses, use the configuration in
the following table. The table describes the Modbus Map for the slave device.
Value Description Type
40261 KW Demand (power) Float. upper 16 bits
40263 VAR Reactive Power Float. upper 16 bits
40265 VA Apparent Power Float. upper 16 bits
40267 Power Factor Float. upper 16 bits
40269 VOLTS Voltage, line to line Float. upper 16 bits
40271 VOLTS Voltage, line to neutral Float. upper 16 bits
40273 AMPS Current Float. upper 16 bits
You must use a COP statement to copy the data from floating-point data tags
within the ControlLogix processor, into the MCMR.DATA.W RITE D ATA array used
by the MVI56E-MCMR module. Below is an example.
The length of this COP statement must now be 14. This will COP as many of the
MCM_F
LOAT _D ATA values required to occupy the MCMR.DATA.W RITE D ATA
array for a length of 14. This will take 7 registers, MCM_F LOAT _D ATA [0] TO [6],
and place that data into MCMR.DATA.W RITE D ATA [0] TO [13].
You must configure the command to write all 7 floats (14 Modbus addresses) as
follows.
The above command will take the data from MCMR.DATA.W RITE D ATA [0] TO [13]
and write this information to Modbus Slave Device Address 1 at data addresses
40261 to 40274.