ATTRIBUTES | EXCEL 50/100/500/600/800 |
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 LONWORKS 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 | manual operating | remote** |
| mode | mode | 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)
30 |
