ProSoft Technology MVI56E-MCM/MCMXT - Manual (Page 49)

MVI56E-MCM ♦ ControlLogix Platform Configuration as a Modbus Master
Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 49 of 199
June 18, 2014
The following COP statement will copy the data from MCM.DATA.R EAD D ATA [0]
TO [13] into the array MCM_F LOAT _D ATA [0] TO [6].
The "Length" parameter is set to the number of Floating-Point values that must
be copied from the MCM.DATA.R
EAD D ATA array.
2.4.3 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 MCM.DATA.W RITE D ATA array used
by the MVI56E-MCM 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 MCM.D ATA .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 MCM.DATA.W RITE D ATA [0] TO [13].
You must configure the command to write all 7 floats (14 Modbus addresses) as
follows.