Endress+Hauser Proline Promag 55 Operating Manual page 72

2 Resource Block
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72
2.3 Write protection and simulation
Write protection of the device parameters and simulation in the Analog Input and Discrete Output
function block can be locked or unlocked via a jumper setting on the FOUNDATION Fieldbus
I/O board (→ Operating Instructions for Proline Promag 55 FOUNDATION Fieldbus, BA126D).
The parameter WRITE_LOCK shows the status of the hardware write protection. The following
statuses are possible:
– LOCKED = Device data cannot be modified by means of the FOUNDATION
– NOT LOCKED = Device data can be modified by means of the FOUNDATION
The parameter BLOCK_ERR indicates whether a simulation is possible in the Analog Input and
Discrete Output function block.
– Simulation Active = Simulation possible in the Analog Input function block via the
2.4 Alarm detection and processing
Process alarms provide information on particular block statuses and block events. The status of the
process alarms is communicated to the fieldbus host system via the parameter BLOCK_ALM. The
parameter ACK_OPTION specifies whether an alarm must be acknowledged via the fieldbus host
system.
The following process alarms are generated by the Resource Block:
Block process alarms
The following block process alarms of the Resource Block are shown via the parameter
BLOCK_ALM:
– OUT OF SERVICE
– SIMULATE ACTVE
Write protect process alarm
If write protection is disabled on the FOUNDATION Fieldbus I/O board, then prior to
communicating the change of status to the fieldbus host system the alarm priority specified in the
parameter WRITE_PRI is checked. The alarm priority specifies the action taken when the write
protection alarm WRITE_ALM is enabled.
Note!
• If the option of a process alarm has not been enabled in the parameter ACK_OPTION, this process
alarm only has to be acknowledged in the parameter BLOCK_ALM.
• The parameter ALARM_SUM shows the current status of all the process alarms.
Device functions Proline Promag 55 FOUNDATION Fieldbus
Fieldbus interface.
Fieldbus interface.
SIMULATE parameter and in the Discrete Output function block via
the SIMULATE_D parameter.
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