IKA RET control/t, Руководство по эксплуатации

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15.1 Serial RS 232 C interface
15.1.1 Configuration
The unit can be controlled from an external PC (using the dedica-
ted software labworldsoft) via the RS 232 C serial interface fitted
to the unit.
To increase safety when controlling the RET control / t from a
PC, enable the watchdog function for monitoring the conti-
nuous serial data flow (see section 15.1.4).
• The functions of the interface lines between laboratory instru-
ment and automation system are selected from the specified
signals of the EIA-standard RS 232 C, corresponding with DIN
66 020 Part 1. The allotment of the bushing can be taken from
illustration.
• For the electrical properties of the interface lines and for the
allotment of the signal status, standard RS 232 C, corresponding
with DIN 66 259 Part 1 applies.
• Transmission method: Asynchronous signal transmission in start
-stop-operation.
• Mode of transmission: Fully Duplex.
• Character format: Character imaging acc. to data format DIN
66 022 for start-stop-operation. 1 start bit; 7 character bits; 1
parity bit [straight (even]); 1 stop bit.
• Transmission speed: 9600 bit/s
• Data flow control: Hardware handshake RTS/CTS
RTS: (pin 7) LOW (positive tension)
/ computer may send
RTS: (pin 7) HIGH (negative tension)
/ computer may not send
CTS: (pin 8) LOW (positive tension)
/ computer recipient
CTS: (pin 8) HIGH (negative tension)
/ computer not recipient
• Access method: Data communication from laboratory instru-
ment to computer is only possible on demand of the computer.
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022009
Connections and interfaces
15
Mains connection
Analog output
and RS 232 C
Connection
PT 100 / PT1000
5
10
15
1
6
11
analog GnD
temperature
1V = 100 °C
speed 1V
= 1000
rpm
RS232_GnD
TxD
RxD
RTS
CTS
^
^
P
t1
0
0
0
-2
5
3
1
4
2
P
t1
0
0
0
-1
P
t1
0
0
5
3
1
4
2