Lenze MCH Series Drives Modbus Communications - Manual (Page 8)

RG-MHMOD 4
Introduction
16 Preset Multiple Registers (4X references). Although the function is for multiple registers, we will
accept only a single register to be written.
Note: Since we do not differentiate between 4X and 3X references, function codes 03 and 04 are
treated identically.
E. Exception codes:
01 - Command rejected, Illegal function
02 - No such register
03 - Data out of range
04 - Wrong data format
06 - Slave device busy. In Keypad Programming mode, cannot write registers.
F. The AC Tech drive will most nearly conform to the Modicon® Micro 84 in capabilities. This may be of
importance when configuring networks for DDE Servers.
G. Modbus® and Modicon® are registered trademarks of Schneider Electric. For more information about
the Modbus Protocol please refer to the Modicon Modbus Protocol Reference Guide. Web resources:
http://www.Modbus-IDA.org and http://www.schneider-electric.com.
2.2 Universal Registers
Lenze-AC Tech manufactures several drive families. Currently the QC, MC, MCH, SC, TC, smd, Tmd and SMV
Series drives support Modbus based communications. Since each drive family has different parameters
and size ranges, the parameter (register) definitions are in many cases quite different. In order to facilitate
communication in a network with a mix of drive types, certain AC Tech Register locations have been made
universal among AC Tech drives. While their locations are consistent, their contents may vary as defined
in Table 2.
Table 2: Contents of Universal Registers
AC Tech Reg # Function
1 Drive Control (WRITE ONLY). Not all drives will have all control functions but when the function is
available it will be at a defined bit location within Register #1. Drive Family and register Configuration
Number dependent.
19 Drive Family (READ ONLY) This register is CONSISTENT AMONG ALL AC TECH DRIVES:
- 64 -- QC family
- 67 -- - 70 -- TC family
- 65 -- MC family - 68 -- MCH family - 71 -- Tmd family
- 66 -- SC family - 69 -- smd family - 72 -- SMV family
21 Drive Size (READ ONLY). Code to identify Power (HP/KW) and Line Voltage of the drive. Family
dependent. For the MCH series refer to section 5.3.
24 Drive Status (READ ONLY). Various operational variables.
48 Unlock Control (WRITE ONLY).
49 Unlock Writing of registers (WRITE ONLY).
50 Parameter Configuration Number (READ ONLY).