Sartorius DCU 3, Operator'S Handbook Manual

Page: 93 / 150

Operators Handbook DCU3 – System
9., Main function „Maintenance“
BAEDCU3 - Rev. 4.6 - 0504 9 - 5
Column Entry Meaning
I/O Addr., Tag Name DOP01 HEAT,
DOP02 FEEDP, etc. Tag of digital output; setting of operating
“MODE” and status of “value” entry
Mode auto normal operation, DCU triggers the output
lock (display only) output is switched via locking
function, such as alarm locking
shut (display only) output switched to safe state
via shut-down function
manual manual operation, manual setting of digital
output
sequ (display only) output switched by sequence,
such as sterilization program
pump output triggered by pump calibration function
host output triggered by host computer
opst output switched to rest state;
no internal function triggers output
Value off digital output switched off
on digital output switched on
nn% pulse control factorfor pwm digital outputs, in
the range of 0 ... 100%
9.4.2 Abbreviations (TAGs) for Digital Outputs
For a complete listing of the abbreviations (TAGs) for digital outputs refer to the supplement.
Unassigned outputs are defined by the name of their physical channel:
- DOM : Digital Output Measurements:
internal DCU digital outputs of measurement amplifiers
- DOP : Digital Output Process
- DO : Digital Outputs
9.4.3 Special Notes
The status can have the following signal levels
- off : 0 V
- on : 5 V for internal DCU outputs (DOM)
24 V for process outputs (DOP, DO)
For pulse-width modulated (pwm) outputs the relative pulse control factor is displayed or
preset. The cycle time is determined by the fermentor specific configuration.
Example: If the cycle time is set to 10 sec. and the pwm output is 40%, the digital output will be
„on“ for 4 sec. and „off“ for 6 sec.
After operation in „manual“ mode all digital inputs must be reset to „auto“. Other-
wise the functions of the DCU3 - system will be restricted.