IKA C-MAG HS 7 control Instructions Manual page 16

The above details correspond as far as possible to the recommendations of the NAMUR work-
ing party (NAMUR recommendations 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 commands commissioning serve only
as low level commands for communication between the device and the PC� With a suitable ter-
minal or communications program these commands can be transmitted directly to the device�
The IKA software package, Labworldsoft
and collecting data under MS Windows, and includes graphical entry features, for motor speed
ramps for example�
NAMUR Commands Function
IN_NAME Read the device name
IN_PV_1 Read actual external sensor value
IN_PV_2 Read actual hotplate sensor value
IN_PV_4 Read stirring speed value
IN_PV_5 Read viscosity trend value
IN_SP_1 Read rated temperature value
IN_SP_3 Read rated set safety temperature value
IN_SP_4 Read rated speed value
OUT_SP_1 x Adjust the set temperature value
(x=0���500)
OUT_SP_4 x Adjust the set speed value
(x=0���1500)
START_1 Start the heater
STOP_1 Stop the heater
START_4 Start the motor
STOP_4 Stop the motor
RESET Switch to normal operating mode
SET_MODE_n Set operating mode
(n=A, B, or D)
OUT_SP_12@n Setting WD safety limit temperature with set value echo
OUT_SP_42@n Setting WD safety limit speed with set value echo
OUT_WD1@m Watchdog mode 1: if event WD1 should occur, the heating and stirring
functions are switched off and Er02 is displayed� Set watchdog time to m
(20 - 1500) seconds, with watchdog time echo� This command launches the
watchdog function and must be transmitted within the set watchdog time�
OUT_WD2@m Watchdog mode 2: if event WD2 should occur, the speed target value is
changed to the WD safety speed limit and the temperature target value is
changed to the WD safety temperature limit value� The warning WD is dis-
played� The WD2 event can be reset with OUT_WD2@0 - this also stops the
watchdog function� Set watchdog time to m (20 - 1500) seconds, with watch-
dog time echo� This command launches the watchdog function and must be
transmitted within the set watchdog time�
30
, provides a convenient tool for controlling device
®
"Watchdog" functions, monitoring of the serial data flow:
If, once this function has been activated (see NAMUR commands), there is no retransmission of
the command from the computer within the set time ("watchdog time"), the heating and stirring
functions are switched off in accordance with the set "watchdog" function or are changed to the
set target values�
The data transmission may be interrupted by, for example, a crash in the operating system, a power
failure in the PC or an issue with the connection table between the computer and the device�
"Watchdog" – mode 1:
If there is an interruption in data communications (longer than the set watchdog time), the heating
and stirring functions are switched off and Er02 is displayed�
"Watchdog" – mode 2:
If there is an interruption in data communications (longer than the set watchdog time), the speed
target value is changed to the WD safety speed limit and the temperature target value is changed
to the WD safety temperature limit value� The warning WD is displayed�
PC 1.1 cable:
This cable is required to connect RS 232 port to a PC�
1
6
2
7
3
8
4
9
5
1
RxD 2
TxD 3
4
GND 5
6
RTS 7
CTS 8
9
USB cable A – B:
This cable is required to connect USB port to a PC�
USB B
5
9
4
8
3
7
2
6
1
1
2 RxD
3 TxD
PC
4
5 GND
6
7 RTS
8 CTS
9
USB A
31