Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 79)

Publication 900-UM007D-EN-E - January 2011
Configuration & Basic Operation 3-9
Setting Up Communications Parameter Data
Set the Bulletin 900 controller communication parameter specifications so that
they match the communication parameter setup for the personal computer,
using configuration/monitoring software such as 900BuilderLite. In a
multidrop (RS-485) 1:N configuration, match the setting data except for the
communications unit numbers on all 900-TC controllers. All Controllers must
have unique communications unit numbers.
✟ The Communication Data Length and Communication Stop Bits parameter is displayed only when 900-TC
communications are selected from the Protocol Setting parameter.
Initial Setup Examples The
O
and
M keys are used to switch between configuration menus, and the
amount of time that you hold the keys down determines which configuration
menu you move to. This section describes two typical examples.
EXAMPLE
Figure 3.7 — Explanation of Examples
Table 3.B
Parameter Symbol Configurable (Monitor) Value Selection Symbols Default Unit
Protocol setting
psel
900-TC or Modbus
cwf
,
mod
900-TC None
Communications Unit No.
u-no
0…99 1 None
Communications baud rate
bps
1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6 9.6 kbit/s
Communications data
length
✟
len
7, 8 7 Bits
Communications stop bits
✟
sbit
1, 2 2 Bits
Communications parity
prty
None, Even, Odd None, Even, Odd Even None
Send data wait time
sdwe
0…99 20 ms
25
0
C
in-t
0
cntl
onof
cntl
M
M
M
onof
in-l
0
in-h
100
Changing Parameters
A image means that there are parameters.
Continue pressing the
M key to change parameters
until you reach the intended parameter.
Changing Numbers
Numeric data and selections in each
screen can be changed by using the
U and D keys.