Supplement B
PLC Workstation
RTS handshaking Check this item to specify the 700T should
wait to transmit until the CTS input on
the communication port is asserted. This
is sometimes called "hardware
handshaking." This is available for only a
number of PLCs.
Command delay (x10ms) Enter a number between 0 and 255 to
specify the amount of time that the 700T
waits between sending commands to your
PLC. The unit of time is 10 milliseconds
and the default is 0. However, many PLCs
consume additional scan time to service
requests from the 700T, and if you find
that your PLC's scan time is too long, you
can increase the "Command delay" to slow
down the Workstation. This is available
for only a number of PLCs.
PLC Model Code Select a number to specify the sub-type of
your PLC. This parameter is only useful
for some types of PLCs, such as Simatic
S5.
You can use Miscellaneous Settings dialog box of ADP3 to set
the screen saver time for your 700T.
If you set the screen
saver time to 0, the 700T never turns off the back light.
B.11 Serial Communication Port (COM2)
COM2 is a serial port that supports RS-232, RS-422, and RS-
485 operation. The pin assignments of the port are listed in
the following table:
Pi
n
Function Pin Function
1 Chassis ground 14 RS-422 TXD+ and RS-485 TXD/RXD+
2 RS-232 TXD 15 RS-422 TXD- and RS-485 TXD/RXD-
3 RS-232 RXD 16 RS-422 RXD+
4 RS-232 RTS 17 RS-422 RXD-
5 RS-232 CTS 18 (no function)
6 (no function) 19 (no function)
7 Signal ground 20 (no function)
8
*
(no function)/5V
max 250mA
output, when
JB1-pin1-2
connected
21 RS-422 terminating resistor for
RXD-; the other terminal of the
resistor (120Ω, 1/2W) is already
connected with the RXD+
9 (no function) 22 RS-422 terminating resistor for
CTS-; the other terminal of the
B-14
To Next Page
Loading...