Warner Electric CBC-1000 - Manual (Page 24)

22 Warner Electric • 800-825-9050 P-275 • 819-0496
Serial Interface
Host Mode CBC-1000 Display
C P: MOV PST .000
4 P: MOV PST .004
5 P: MOV PST .045
6 P: MOV PST .456
7 P: MOV PST 4.567
8 P: MOV PST 45.678
9 P: MOV PST 456.789
The first serial entry (‘C’) clears the data field for the
current line. As can be seen in the COMMAND
CHARACTER table, this character mimics the
RESET/CLEAR key. Numeric data entry is self
explanatory.
Multiple Unit Operation
For multiple unit systems (up to 32 units) a special
addressing scheme is implemented so no conflicts
arise on the serial bus. Each unit is given a unique
serial address (ID number entered on line 25). Such
a system application is shown on page 20. All units
are programmed with the same baud rate and
parity. It is advised that the initial ID number
programming be done before the units are
bussed together.
To control one CBC-1000 in a bus oriented system
the host must first address it by sending an
ADDRESS COMMAND SEQUENCE. This is shown
below.
host: (ESC) A nn (where nn is unit number 1 to 99)
This escape code sequence will suspend the
transmission from all units including the one that is
addressed. The addressed unit will respond to all
subsequent commands while the other units just
“listen” on their receive input and turn their transmit
output off.
To receive data from an addressed unit the host
sends it a command to resume transmission using
the RESUME control character, (CTRL Q).
If you wish to suspend data data transmission you
may do so by using the SUSPEND control
character, (CTRL S).
In some cases the host may want to send many
commands to a CBC-1000 control without waiting
for responses. This may be done by first
suspending transmission (CTRL S) then by
requesting a single UPDATE.
host: (ESC) U
Setup Mode Operation
The SETUP mode may be entered directly from the
RUN mode by cursoring to the desired SETUP line
(4-8) using the ‘D’ command character then sending
the ‘L’ command character which mimics the KEY
keyboard key. This action will place the control in
the SETUP mode allowing the user to change the
data in lines 3 through 8 in the program table. Serial
entry into the SETUP mode has the same
operational requirements and restrictions as if it
were entered via the front panel keyboard. Refer to
pages 6-8 for a complete operational description.
Preset setpoints are changed using the numeric
RST/CLR and DOWN cursor keys. The SETUP
mode is exited by sending another ‘L’ command
character at which time the controls revert back to
the RUN mode.
Remote Operation
Some of the unit’s CONTROL inputs are
effectively duplicated by serial commands, so it is
possible to implement a single or multiple unit
system with remote capability. Such a system can
be used for multiple machine, multiple axis or
multiple section applications. Keep in mind the
addressing requirements for multiple unit systems
previously discussed.