4.3.1 FM 3545 Approval

 

In 816L, 808L and 804L Alarm 2 is permanently assigned to the changeover relay output (OP4). Alarm 2 threshold is protected by a password and cannot be promoted to Level 1 and is, therefore, available in Level 2 only. The password which protects Level 2 access (P76 configuration parameter) cannot assume the 0 value, that is password disabled.

 

The above constraints lock some configuration parameters to fixed values and, therefore, cannot be changed. The following table provides a summary of these parameters, which are also reproduced in the configuration section 5.2.

 

Parameter	Function	Locked value or range	Meaning
P14	Output 4	AL2.i	Output 4 assigned to alarm 2 block with inverted action
P24	Alarm 2 type	Only the Hi and Lo options are available	Alarm 2 is independent of the control set point
P25	Alarm 2 latching	Man	Manual latching, alarm condition must be removed before acknowledgement
P26	Alarm 2 blocking	No	Alarm cannot be ignored during start up
P35	Sensor break alarm type	Lat	A sensor break alarm will be latched
P37	Sensor break alarms output	AL2	A sensor break alarm is assigned to alarm 2
P76	Level 2 pass code	1 – 9999	Level 2 password cannot be disabled
Operating settings AL2	Alarm 2 threshold promotion	Level 2	Alarm 2 threshold is available at Level 2 only

 

These restrictions are active by keyboard and both comms serial interface (i.e. EIA485 and the configuration port) and apply only to FM approved versions. The non-FM approved versions are freely programmable.