Warner Electric CBC-1000 - Manual (Page 23)

21 Warner Electric • 800-825-9050 P-275 • 819-0496
Serial Interface
Cable Selection
The CBC-1000 serial interface uses a simple
interconnect scheme and low cost wiring making it
superior to parallel data transfer schemes. Through
three wire pairs, remote operation at distances up to
5,000 feet can be implemented. The following
general guidelines should be observed:
1. Use #24 AWG Twisted pair, overall
shielded cable.
2. Use a “daisy chained” connection scheme for bus
systems.
3. if a “multidrop” system is used, keep the drop
length at 10% of the main line.
4. Tie the cable shield to Building Ground at the
CBC-1000 end of the cable.
Single Unit Operation
The operator can monitor the control locally via the
front panel keyboard and display. The serial
interface extends these monitoring activities to a
remote location. The connection of a remote display
terminal is straightforward. The baud rate and parity
for both devices must be the same. The ID number
should be set to ‘0’ (line 25 in the program table).
When power is applied to the CBC-1000 control, it
will start a continuous serial transmission of the
count:
CBC-1000 Display R: CNT. 123.456
when in the RUN mode.
The function keys (1, 2, 3, 6, 7, & 8) are set to scroll
down through the eight RUN modes lines.
For example:
In the RUN mode the numbers 1, 2, 3, 6, 7, & 8
cause new lines to be transmitted.
We have seen how the CBC-1000 control works for
remote viewing; we will now see how
programming may be done from a remote
location.
You may program only one CBC-1000 control at a
time. If the unit is in program mode via the front
panel keyboard, then it will not respond to the serial
input. To enter the PROGRAM mode, first send the
RUN/PGM (‘P’) character. The control will “answer”
by transmitting the LOC entry line as shown below.
Host Mode CBC-1000 Display
P R: LOC. 1
The control remains active (in the RUN mode) until
the proper lock combination is entered. Each
numeric entry is entered from right to left “calculator
style”. The character sequence 1-0-0-0 would
produce the following display on the terminal:
Host Mode CBC-1000 Display
1 R: LOC. 1
0 R: LOC. 10
0 R: LOC. 100
0 R: LOC. 1000
When this combination is correctly entered with a
down cursor from the CBC-1000 keyboard or “D”
from Host Terminal, the control exits the RUN mode
and enters the PROGRAM mode and returns with
the following:
Host Mode CBC-1000 Display
D P: bd. 25
Note that the PROGRAM (‘P’) prompt is now
shown. You are at the top of the PROGRAM table
(line 1) as shown on page 12. Once the PROGRAM
mode has been entered it is possible to program
any line in the table. Refer to the COMMAND
CHARACTER table for the keyboard equivalent
serial characters. A programming example is shown
on page 23.
Host Mode CBC-100 Display
1 R: CNT 123.456
2 R: MOV PST 11.50
3 R: E.W. 0.25
6 R: BCH 1500
7 R: BCH PST 2500
8 R: BRK DIS 0.25