Control Techniques UD70, User Manual

Page: 73 / 154

UD70
Issue code: 70nu2
Serial communications 6-13
Mode 6 User mode
This mode turns off all internal protocols and allows the user to use the
RS485
port directly from a DPL program. Typically, this mode will be used
in conjunction with the DPL
ANSI
master commands (
ANSIREAD
,
ANSIWRITE
,
etc.). User-defined protocols can also be implemented in
DPL
with the low-
level
PUTCHAR
and
GETCHAR
commands. The communications data-frame
is organized as follows:
1 start bit, 7 data bits,
EVEN
parity, 1 stop bit, 10 bits total
Mode 7 User mode
This mode turns off all internal protocols and allows the user to write and
read directly from the
ANSI
port using the
PUTCHAR
and
GETCHAR
functions.
The communications data-frame is organized as follows:
1 start bit, 8 data bits,
EVEN
parity, 1 stop bit, 11 bits total
Mode 8 User mode
This mode turns off all internal protocols and allows the user to write and
read directly from the
ANSI RS
485 port using the
PUTCHAR
and
GETCHAR
functions. The communications data-frame is organized as:
1 start bit, 8 data bits,
NO
parity, 1 stop bit, 10 bits total
Mode 9 User mode
The communications data-frame is organized as:
1 start bit, 9 data bits, NO parity, 1 stop bit, 11 bits total
Mode 10 I/O Box mode
This mode allows a
single
I/O Box to be connected directly to the UD70
using the EIA RS485 port.
If multiple I/O Boxes are required, they must be set up in standard ANSI
mode. Mode 6 must be selected, and the DPL RS485 commands must be
used to transfer data.
Mode 11 User mode
This mode bypasses the internal software buffers and interfaces directly to
the hardware. This reduces the delay in passing data through the UD70
RS485 port. The baud rate is programmable, as with the other modes.
The communications data-frame is organized as:
1 start bit, 9 data bits, NO parity, 1 stop bit, 11 bits total