IKA RC 2 basic - Manual (Page 14)

14
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 Blank CR LF
(Code: hex 0x20 hex 0x0d hex 0x20 hex 0x0A) and have
a maximum length of 80 characters.
- The decimal separator in a number is a dot (Code: hex
0x2E).
The above details correspond as far as possible to the rec-
ommendations of the NAMUR working party (NAMUR rec-
ommendations 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 commu-
nication between the device and the PC. With a suitable
terminal or communications programme these commands
can be transmitted directly to the circulator equipment. The
IKA
® software package, Labworldsoft ® , provides a conve-
nient tool for controlling circulating equipment and collect-
ing data under MS Windows, and includes graphical entry
features, for pump motor speed ramps for example.
PC 1.1 Cable:
This cable is required to connect RS 232 port (10) to a PC.
1
2 RxD
3 TxD
4
5 GND
6
7 RTS
8 CTS
9
1
RxD 2
TxD 3
4
GND 5
6
RTS 7
CTS 8
9
PC
1
2
3
4
5
6
7
8
9
9
8
7
6
5
4
3
2
1
Fig. 14
Commands:
NAMUR
Commands
Function
IN_PV_2 Read the internal actual temperature
IN_PV_4 Read the pump actual speed
IN_SP_1 Read the internal setting temperature
IN_SP_4 Read the pump setting speed
IN_TMODE Read temperature control
0: internal regulation
OUT_SP_1 xxx Set the internal setting temperature XXX
OUT_SP_12@n Set the WD safety temperature with echo of the set (defined) value.
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_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 heating 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