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ATTRIBUTES EXCEL 50/100/500/600/800
EN2B-0092GE51 R0512 30
Manual During manual operation, the controller uses the manual values, for example, "flow
temperature setpoint = 60°C". Outputs adopt the preselected condition, for
example
, "Heating circuit pump on".
Automatic/Manual Alarm For automatic operation, the attribute "Operating Mode" contains the inputs "Auto"
and "Manual". Each switch from automatic to manual operation and back again
generates a critical alarm.
Remote (V2.0.x) (not Excel 100C) If manual override controls are present on either the Analog Output (XFL522) or
Digital Output (XFL524) modules connected via a L
ONWORKS network, then the
status of these controls (automatic/manual override) is stored in the attribute
"Operating Mode". If the manual override controls are set to automatic, the attribute
"Operating Mode" can be set to either automatic or manual. If the manual override
controls are set to manual override, then the attribute "Operating Mode" can be in
the remote mode, only.
Fig. 17 and Fig. 18 demonstrate the relationship between the attribute "Operating
Mode", and both the attributes "Value" and "Manual Value" for input and output
functions.
Fig. 17. Control flow for input functions
Fig. 18. Control flow for output functions
NOTE: The attribute "Remote" is available only if Manual Override modules are
installed on the Distributed I/O output modules. This attribute is therefore
not applicable to Excel 50/100/600.
Analog Points Table 13 indicates the analog point signals depending on the attribute "Operating
Mode":
Table 13. Analog point signals
auto operating
mode
manual operating
mode
remote**
operating mode
automatic value*
20% don’t care don't care
manual value don't care 10% don't care
remote value don't care don't care 50%
resulting value
20% 10% 50%
output signal
2 V 1 V 5 V
* Automatic value is either the physical point value (inputs) or the value from the
program (outputs)