Lenze smd Series Drives - Manual (Page 9)

5 RG-SDMOD
Introduction
D. The function codes supported by the smd 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:
Parameter C99 (Software Version) is a 4-word read.
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 smd 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.