Configuring The Rs-485 Network - Allen-Bradley 22-COMM-E FRN 1.xxx User Manual

Configuring the RS-485 Network

The following parameters must be set in the daisy-chained drives:
Parameter
P36 - [Start Source]
P38 - [Speed Reference]
A103 - [Comm Data Rate]
A104 - [Comm Node Addr]
A107 - [Comm Format]
Note that the RS-485 network is fixed at 19.2K baud, 8 data bits, no
parity, and 1 stop bit.
Important: Parameters A105 - [Comm Loss Action] and A106 -
[Comm Loss Time] in the daisy-chained drives are still
used in Multi-Drive mode. If the RS-485 cable is
disconnected or broken, the disconnected drive(s) will take
the corresponding Comm Loss Action(s). On the EtherNet/
IP side, Parameters 18 - [Comm Flt Action] and 19 -
[Idle Flt Action] in the 22-COMM-E determine the action
taken for ALL of the drives on the Multi-Drive node.
The following Multi-Drive parameters must be set in the 22-COMM-E:
Parameter
22 - [DSI I/O Cfg]
24 - [Drv 0 Addr]
25 - [Drv 1 Addr]
26 - [Drv 2 Addr]
27 - [Drv 3 Addr]
28 - [Drv 4 Addr]
After setting the 22-COMM-E parameters, set the Operating Mode
Switch (SW1) from Single drive operation to Multi-Drive operation (set
to ON position), and reset the adapter or cycle power. Refer to
Setting Operating Mode and Web Pages
Important: 22-COMM-E parameters can be set using a DSI peripheral
(HIM, DriveExplorer with 22-SCM-232, etc.) ONLY when
the Operating Mode Switch is in the Single mode position
(SW1 = OFF).
Using Multi-Drive Mode
Value
5 (Comm Port)
5 (Comm Port)
4 ("19.2K")
1-247 (must be unique)
0 ("RTU 8-N-1")
Value
0 = Drive 0 connected
1 = Drives 0-1 connected
2 = Drives 0-2 connected
3 = Drives 0-3 connected
4 = Drives 0-4 connected
= Parameter A104 - [Comm Node Address] in Drive 0
= Parameter A104 - [Comm Node Address] in Drive 1
= Parameter A104 - [Comm Node Address] in Drive 2
= Parameter A104 - [Comm Node Address] in Drive 3
= Parameter A104 - [Comm Node Address] in Drive 4
Switches.
7-5
Chapter 2,