21
20
Error messages
The following error messages can be displayed (
Fig. 20
) and have the following causes described:
Error code
Cause
Correction
Er2
In remote operation (PC) mode with activated
watchdog function in mode 1: no communication
between PC and
HBR 4 control
. PC does not
transmit any data within the set watchdog time, or
connection to PC is interrupted.
Change watchdog time.
Transmit data from PC within set watchdog time (OUT_WDx@m).
Check cable and plug.
Er3
Internal device temperature above 76 °C
Allow the device to cool down
Mains switch OFF/ON
Er4
Er4
Motor speed deviates ±300 rpm from the speed
Set speed greater than 350 rpm
Stirring function turned on, Actual speed = 0 rpm
Indication after approx 30 sec
Reduce load
Mains switch OFF/ON
Mains switch OFF/ON
Increase the speed or turn on the stirring function
Er5
No temperature increase in PT 1000.60/61 at con-
tinuous temperature difference (corresponding to
the set error 5 response time)
Place the temperature sensor in the medium.
Adjust the error 5 response time according to the response cha-
racteristic of the system.
Er11
Temperature sensor PT 1000 unplugged during
operation
Plug in and unplug temperature sensor only when
HBR 4 control
is switched off.
Er12
Temperature sensor PT 1000 plugged in during
operation
Plug in and unplug temperature sensor only when
HBR 4 control
is switched off.
Er20
Safety relay does not close
Safety circuit is set too low, check mains voltage (mains voltage
must be larger than the nominal voltage - 10%).
Mains switch OFF/ON
Er21
Safety relay does not open
RESETbutton / service
Er22
Disturbance before the last time the device was
switched OFF or safety temperature is lower then
the temperature of the medium
RESET button
Er23
Adjustable safety circuit faulty
Mains switch OFF/ON / service
Er24
Safety temperature set exceeded
Set safety temperature higher
Mains switch OFF/ON
Er26
System dry, no medium in the bath container
Allow the device to cool down, then refill with medium.
Mains switch OFF/ON
Er27
Calibration error
Mains switch OFF/ON. When switching on, a calibration is auto-
matically carried out.
Er28
Sensor rupture
Mains switch OFF/ON
Er29
Short circuit in the safety sensor or controller and
safety sensor mixed up
Service
Er 30
Short circuit in the controller sensor
Service
If the actions described fail to resolve the fault or another error code is displayed then take one of the following steps:
- contact the
IKA
service department,
- send the device for repair, including a short description of the fault.
Interfaces and outputs
The device can be operated in “Remote” mode via an RS 232 using
the laboratory software
Labworldsoft
®
.
Note:
Please comply with the system requirements together with
the operating instructions and help section included with the soft-
ware.
Configuration
The RS 232 serial interface can be used to operate the device using
a computer and a suitable user program (
Labworldsoft
®
).
In order to increase safety when operating the
HBR 4 control
using a PC, a watchdog function can be activated which monitors
the continuous data flow (see section entitled: “Watchdog func-
tion”).
• The functions of the interface circuit between the laboratory de-
vice and the automation system are a selection from the signals
specified in the EIA standard RS 232 C as per DIN 66020 Part 1.
The assignment of the different signals can be seen in the image.
• Standard RS 232 C, corresponding to DIN 66259 Part 1 is valid
for the electronic characteristics of the interface circuits and as-
signment of signal states.
• Transmission process: asynchronous character transmission in
start-stop operation.
• Transmission type: full duplex
• Character format: character composition according to data for-
mat in DIN 66022 for start-stop operation. 1 start bit, 7 charac-
ter bits, 1 parity bit (even), 1 stop bit.
• Transmission speed: 9600 bit/s
• Data flow control: hardware handshake
• Access method: data transmission from the device to the com-
puter only occurs after a request from the computer.
Command syntax
The following points should be noted for the instruction set:
• Commands are generally sent from the computer (master) to the
lab device (slave).
• The device sends only at the computer’s request. Even fault in-
dications cannot be sent spontaneously from the device to the
computer (automation system).
• Commands and parameters, as well as consecutive parameters,
must be separated by at least one space (code: hex0x20).
• Each individual command (incl. parameters and data) and each
response are terminated with Blank CR LF (Code: hex 0x0D and
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 recommen-
dations of the NAMUR working 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).
Summary of available NAMUR commands
Abbreviations used:
X,y =
numbering parameter (integer)
m
=
variable value, integer
n
=
variable value, floating-point number
X
=
1
Temperature of external sensor
X = 2 Bath
temperature
X
=
3
Bath safety temperature
X
=
4
Speed
X
=
52
External PT 1000 temperature sensor offset in K (-3.0 <= n <=+3.0 )
X
=
54
Error 5 response time in minutes (1 <= n <= 30)