Samson 5100, 5179 operating instructions 8.3Temperature monitoring, Operational faults

Operational faults

8.3Temperature monitoring

The flow temperature and the room temperature can be monitored for any deviations. This func- tion is activated in Co5 -> Fb20. The controller issues an alarm when:

￿the flow temperature deviates from its set point by more than 10 °C for more than 30 minutes

￿the room temperature falls below its set point by 2 °C for more than 30 minutes ￿the return flow temperature limitation is active for more than 30 minutes.

When one of these conditions occurs, the bit for the associated sensor is set in holding regis- ter 857. A set bit in holding register HR 857 causes the bit 4 to be set in the error status register FSR2 (HR 61) and in the error archive register 2 (HR 63) and the error counter (HR 64) is incre- mented.

Function	WE	Configuration
Temperature monitoring	OFF	Co5 -> Fb20 = ON

Holding register 857 (		appears on the right-hand side of the set bit number)
Number = Bit number in HR		0 1 2 3 4 5 6 7 8 9 10 11 12
VFprim:	Measured value (set point + 10 °C)
RüFprim:	Limitation active
	(actual return flow blinks in InF5)
VF1:	Meas. value > (set point +10 °C)
RüF1:	Limitation active
RF1:	Meas. value < (set point – 2 °C)
VF2:	Meas. value > (set point + 10 °C)
RüF2:	Limitation active
RF2:	Meas. value < (set point – 2 °C)
VF3:	Meas. value > (set point + 10 °C)
RüF3:	Limitation active
RF3:	Meas. value < (set point – 2 °C)
VFTW:	Meas. value > (set point + 10 °C)
RüFTW:	Limitation active
	(actual return flow blinks in InF4)

70EB 5179 EN