Honeywell FlexLine SmartServo 954 Service Manual page 71

COMMISSIONING
Element
W&M jumper
External watchdog
RTC
Low power
NV memory
Part No.: 4417340 Revision 1
Description
temperature dependency of the magnetic field. By this magnet
temperature measurement, the firmware compensates the level
calculation.
Weight and Measures jumper or switch located on every
FlexConn board for protecting modification of W&M relevant
entities (device parameters) and firmware. The W&M status is
daisy chained to the other boards so only one of the boards need
to be set to protect / seal status and all other boards will read that
protect / seal status.
In addition to an internal watchdog in the micro controller the
CAN-SERVO board implements an external watchdog in order to
improve the SIL hardware FMEDA figures.
Real Time Clock used for date and time stamping of
measurements and diagnostics.
Signal generated by the CAN-SERVO board in case the power
drops below a certain threshold where the firmware needs stop
the servo stepper motor and store relevant operational data in
non-volatile memory e.g. motor position.
Non-volatile memory to store diagnostic data, operational data
(e.g. motor position) and configuration parameters (entities).
The TII-SRV firmware supports the following process data
measurements reflected in a Primary Variable (FlexConn PV):
•
Displacer level (innage, ullage is in Secondary Variable)
•
Product level (innage, ullage is in Secondary Variable)
•
Interface level (innage, ullage is in Secondary Variable)
•
Water level (innage, ullage is in Secondary Variable)
•
Average density
The TII-SRV firmware supports the following operational modes:
•
Interface 1 (vapor – product interface)
•
Interface 2 (product – product interface)
• Interface 3 (product – water interface)
•
Dip mode (vapor – product interface, avoiding contamination or
damaging of the displacer)
Service Manual
954 SmartServo FlexLine
63