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Hot gas safety procedure for Slave offline (parameter A13)
Type HF alarms
In a Master/Slave network the multiplexed hot gas defrost is always
synchronized by the Master. The safety procedure switches the Slave OFF
if it is offline (no longer by the Master across the tLAN).
The type HF HACCP alarm is generated following a power failure for an
extended time (> 1 minute), if when power returns the temperature
read by probe set for parameter AA exceeds the AH high temperature
threshold. HFn indicates the number of type HF alarms activated.
Par.
A13
Description
Hot gas safety procedure for Slave offline
0 = not enabled; 1 = enabled
Def
0
Min
0
Max
1
UoM
-
Par.
Description
HFn
Number of type HF alarms
HF to HF2 Type HF HACCP alarms activated
(press Set)
y__
Alarm 1 to 3 - Year
M__
Alarm 1 to 3 - Month
d__
Alarm 1 to 3 – Day of the month
h__
Alarm 1 to 3 – Hours
n__
Alarm 1 to 3 – Minutes
--Alarm 1 to 3 – Duration
Tab. 9.g
Alarm log (parameters HS0 to HS9)
The alarm log can be displayed by accessing parameters HS0 to HS9,
rather than using the procedure described in paragraph 9.3.
Par.
HS0 to 9
--h__
n__
---
Description
Alarm 0 to 9 (press Set)
Alarm 0 to 9 - Code
Alarm 0 to 9 - Hours
Alarm 0 to 9 – Minutes
Alarm 0 to 9 - Duration
Def
0
0
0
Min
0
0
0
Max
23
59
999
UoM
hour
min
min
Def
0
-
Min
0
-
Max
15
-
UoM
-
0
0
0
0
0
0
0
1
1
0
0
0
99
12
31
23
59
240
year
month
day
hour
minute
minute
Tab. 9.j
Tab. 9.h
AH
S
St
9.6 HACCP alarm parameters and activating
monitoring
t
ON
ALARM
OFF
t
Type HA alarms
black out
The alarm queue can be displayed by accessing parameters HA to HA2,
rather than using the procedure described in paragraph 9.4. The type
HA alarm is generated if during normal operation the temperature
read by the probe set for parameter AA exceeds the high temperature
threshold for the time Ad+Htd. Consequently, compared to the normal
high temperature alarm already signalled by the controller, the type HA
HACCP alarm is delayed by a further time Htd specifically for HACCP
recording. The order of alarms listed is progressive, HA is the most recent
alarm. A maximum of 3 errors are saved, in a FIFO list (HA to HA2). HAn
indicates the number of type HA alarms activated.
Par.
Ht0
HAn
HA to
HA2
y__
M__
d__
h__
n__
--Htd
Description
Def
HACCP alarms present
0
Number of type HA alarms
0
Type HA HACCP alarms activated (press Set) Alarm 1 to 3 - Year
Alarm 1 to 3 - Month
Alarm 1 to 3 – Day of the month
Alarm 1 to 3 – Hour
Alarm 1 to 3 – Minutes
Alarm 1 to 3 – Duration
HACCP alarm delay
0 = monitoring disabled
0
0
0
0
0
0
0
Min
0
0
-
Max
1
15
-
UoM
-
0
1
1
0
0
0
0
99
12
31
23
59
240
240
year
month
day
hour
minute
minute
Fig. 9.d
Key
S
St
AH
Tab. 9.i
AH
S
St
t
ON
ALARM
OFF
t
Ad Htd
Fig. 9.c
Key
S
St
AH
ALARM
Ad
Htd
t
Measurement probe
Set point
High temperature alarm threshold
Type HA HACCP alarm
Delay time for high and low temperature alarms
HACCP alarm delay
0 = monitoring disabled
Time
MPXPRO - +0300055EN rel. 1.4 - 16.07.15
62
Measurement probe
Set point
High temperature alarm
threshold
ALARM
t
Type HF HACCP alarm
Time