IKA RC 5 basic Manual page 15

- Character format: character representation in accordance
with data format in DIN 66 022 for start-stop mode. 1
start bit; 7 character bits; 1 parity bit (even); 1 stop bit.
- Transmission speed: 9600 bit/s.
- Data flow control: none
- Access procedure: data transfer from the stirrer machine to
the computer takes place only at the computer's request.
The above details correspond as far as possible to the recommendations of the NAMUR working party (NAMUR recom-
mendations for the design of electrical plug connections for analogue and digital signal transmission on individual items of
laboratory control equipment, rev. 1.1).
The NAMUR commands and the additional specific IKA co mmands serve only as low level commands for communication
between the device and the PC. With a suitable terminal or communications programme these commands can be transmit-
ted directly to the circulator equipment. The IKA software package, Labworldsoft
ling circulating equipment and collecting data under MS Windows, and includes graphical entry features, for pump motor
speed ramps for example.
Commands:
Commands Function
IN_PV_1 Read the external actual temperature
IN_PV_2 Read the internal actual temperature
IN_PV_4 Read the pump actual speed
IN_SP_1 Read the internal setting temperature (if ET=0)
Read the external setting temperature (if ET=1)
IN_SP_4 Read the pump setting speed
IN_TMODE Read temperature control
0: internal regulation
1: external regulation
OUT_SP_1 xxx Set the internal setting temperature XXX (if ET=0)
Set the external setting temperature XXX (if ET=1)
OUT_SP_4 xxx Set the pump speed XXX
OUT_SP_42@n Set the WD-safety speed with echo of the set (defined) value.
OUT_TMODE_0 Set to Internal temperature control
OUT_TMODE_1 Set to External temperature control
OUT_WD1@n Start the watchdog mode 1 and set the time for the watchdog to n (20...1500) seconds.
Echo of the Watchdog time.
During a WD1-event, the refrigerating and pump functions are switched off and message PC 1 is
displayed.
This command needs to be send within the watchdog time.
OUT_WD2@n Start the watchdog mode 2 and set the watchdog time to n (20...1500) seconds.
Echo of the watchdog time.
During a WD2-event, the set temperature is changed to the WD safety temperature and the pump
set speed is set to the WD safety speed. The PC 2 warning is displayed.
This command needs to be send within the watchdog time.
RESET Reset the PC control and stop the device functions.
START_1 Start the tempering function
START_4 Start the pump function
STOP_1 Stop the tempering function
STOP_4 Stop the pump function
Command syntax and format:
The following applies to the command set:
- Commands are generally sent from the computer (Master)
to the device (Slave).
- The device sends only at the computer's request. Even
fault indications cannot be sent spontaneously from the
device to the computer (automation system).
- Commands are transmitted in capital letters.
- Commands and parameters including successive parame-
ters are separated by at least one space (Code: hex 0x20).
- Each individual command (incl. parameters and data) and
each response are terminated with CR LF (Code: hex 0x0d
hex 0x0A) and have a maximum length of 80 characters.
- The decimal separator in a number is a dot (Code: hex
0x2E).
®
, provides a convenient tool for control-
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