Lenze Tmd Series Drives Modbus Communications - Manual (Page 9)

5 RG-TDMOD
Data & Register Format
D. The function codes supported by the Tmd drives are:
03 Read Holding Register (4X references). In general we can read only one register at a time. However,
there are a few limited exceptions.
Exception One:
Register #24 (Modbus Register #25) Drive Status, can also be read as a group of 6 words.
Exception Two:
The
Tmd uses a method of reading a group of related registers that may not be consecutive within
the drive memory map. When this is done for the registers below, the response from the drive will
be for the number of words requested but will not be with consecutive registers.
Register #114 (Modbus Register #115), Software version, should be read as a group of 4 words.
04 Read Input Register (3X references). As with function 03, we read one register at a time except
where noted.
06 Preset Single Register (4X references). Write single register.
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
F. The Tmd 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.