- 3 -
The following table (Tab. 1: Error messages) describes the errors and their impact in the system. If only the group
of the valves is blocked, other groups or individual valves continue operation. If the entire plant is blocked, no
valve is triggered until the occurred error has been repaired and acknowledged.
Error
Error description
Impact
No valve feedback
(open)
No “open” signal from valve after pre
-set opening time + 10
seconds (default)
Group of valves is
blocked
No valve feedback
(close)
No “close” signal from valve after pre
-set closing time + 10
seconds (default)
Group of valves is
blocked
Drain overflow
Overflow sensor on a B- or C-valve was released
Group of valves is
blocked
No B-valve
assigned
No B-valve (group valve) is assigned to an A-valve
Group of valves is
blocked
Plant in
quick stop mode
Quick stop button was pressed
Entire system is blocked
Fuse in the control
cabinet activated
Power circuit breaker in the control panel was released
Entire system is blocked
Tab. 1: Error messages
“Water change” signal light
An active water change process in the drinking water installation is indicated by this signal light. It is not
possible to change the settings of the KHS Logic Control System while a water change process is active.
1.5 Hardware equipment
The hardware of the KHS Logic Control consists of the Rittal terminal box, Beckhoff top hat
rail PC CX_9000 and several Beckhoff terminals. The KEMPER KHS Logic Control System (Figure 686 02 003)
constists of one of more terminal boxes. This depends on the amount of connected actuators and sensors.
1.6 Circuit diagram
The supplied circuit diagram simplifys the installation of the components.
The circuit diagram comprises contains the following pages:
➢
Cover sheet
➢
Table of contents
➢
Terminal assignments for the incoming feeder.
➢
Overview of the PLC modules (Beckhoff) being used
➢
Terminal assignments:
24V voltage generation
Drain with overflow sensor
Hygiene flushing box
Servo drives
Temperature senor, cold water Pt 1000
Temperature sensor, hot water Pt 1000
Volume flow sensor
5V voltage generation
➢
Cable overview
➢
Parts List