Drive control & communication – Lenze MCH Series Drives Modbus Communications User Manual

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RG-MHMOD 18

Drive Control & Communication

5.6 Kilowatt Hours - Registers #32 & 33

Kilowatt hours are listed as a 32-bit value.

Formula: (High Word x 65536) + Low Word = Total kWh (Kilowatt hours)

5.7 Keypad Speed - Register #40

This register enables the user to set the keypad speed to desired value.

• Range is 0 - 65000 in hundredths of a Hz

• Most significant byte is first, followed by Least significant

• CONTROL OF THE DRIVE SPEED VIA THE SERIAL LINK IS NORMALLY DONE USING THIS PARAMETER.

This register can be written only after enabling serial drive control.

5.8 Total Run Time - Registers #36 & 37

Example: A value of 20 in decimal equals 20 Hours

Example: A value 42 in decimal equals 42 Minutes

5.9 PID Commands - Registers #38, 39, 41 & 43

Registers #38 (PID Setpoint Command), #39 (PID Feedback Value), #41 (Local PID Setpoint Command) and
#43 (Serial PID Command) are all in drive internal units with a range of 0 to 32736. The real world parameter
being controlled is mapped into this internal range based on the feedback device for the parameter being
measured and controlled.

For Example, if the device measures temperature in °C with a range of 10°C to +110°C, then 10°C maps
to 0 in internal units and 110 maps to 32736. A setpoint of 30 °C for the Local PID Setpoint (Register #41)
would be written with a value of 6547 (1993 hex). (32736 * {30 – 10} / {110 – 10}).

5.10 Serial Speed Command - Register #42