Lenze MC Series Drives Modbus Communications - Manual (Page 10)

RG-MCMOD 6
Drive Setup & Operation
4 MC Drive Setup & Operation
4.1 Serial Address
All AC Tech drives have a Serial Address Parameter that must be programmed prior to attempting to
operate the serial interface (Programming Parameter #58 / AC Tech Register #109).
TIP - Avoid using address 1. Most Modbus devices ship with a default address of 1. As duplicate addressing
on a Modbus network is not allowed, this can lead to conflicts when replacing and commissioning nodes.
To avoid this it is recommended that you do not set the slave address to 1.
4.2 Serial Communications Parameter
All AC Tech drives have a Serial Communications Parameter that governs the operation of the Serial Link.
On MC drives this is #57 SERIAL LINK (register #108). Table 4 lists the selections for MC Parameter 57,
SERIAL LINK.
Table 4: MC Parameter 57 Selections
Setting Description Watchdog Timeout Period
00 DISABLE
01 WITH TIMER 10 sec
02 WITHOUT TIMER
Explanation of Terms:
• DISABLED serial link not operational
• WITH TIMER serial link allows reading & writing of both control & programming parameters.
Watchdog timer is enabled (refer to section 4.6,
Watchdog Timer ).
• WITHOUT TIMER serial link allows reading & writing of both control & programming parameters.
Watchdog timer is disabled (refer to section 4.6, Watchdog Timer ).
Prior to attempting to communicate with the drive, Serial Communications Parameter must be appropriately
programmed.
4.3 Control Parameter
The Control Parameter on MC drives (Programming Parameter #30 / AC Tech Register #81) determines
how much control a user has over a drive via the serial link. The Control Parameter must be appropriately
programmed for a particular application. Refer to the MC Series Installation and Operation Manual (M101
or M301, respectively) for a detailed explanation on programming the drive parameters.
TIP - For most serial applications, CONTROL is set to LOCAL on the MC1000 and SERIAL on the MC3000.
Refer to Table 5 for Control settings.