Device communication via the BMS bus
Device communication via the BMS bus
iso1685DP_D00272_02_M_XXEN/07.2017
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10.7 Alarm and operating messages via the BMS bus
Messages are transmitted to a maximum of 12 BMS channels. All alarm and operating
messages that may occur are described below.
10.7.1 Alarm messages
Message
Channel
Description
Alarm 1 (insulation fault)
1
Insulation resistance "prewarning"
(Value < response value 1, R
F
< R
an1
)
Alarm 2 (insulation fault)
2
Insulation resistance "alarm"
(Value < response value 2, R
F
< R
an2
)
Connection system
4
Connection fault system
Connection PE
5
Connection fault earth
Device error
7
Internal device error
Start
insulation fault location
The insulation fault location is started
Overtemperature
coupling
10
Overtemperature coupling terminal L1/+
Overtemperature
coupling
11
Overtemperature coupling terminal L2/–
Overtemperature PGH
12
Overtemperature of the locating current injector
10.7.2 Operating messages
10.7.3 Resetting error messages
Recorded errors are provided as alarm messages on the BMS bus.
The fault messages are reset via the device menu. If the error continues to exist, the mes-
sage will be generated again. The error can also be reset by means of the acknowledge-
ment command via the BMS bus.
Message
Channel
Description
Insulation resistance
1
Current insulation resistance RF
(when R
F
> (R
an1
+ hysteresis))
Insulation resistance
2
Current insulation resistance RF
(when R
F
> (R
an2
+ hysteresis))
Leakage capacitance
4
Leakage capacitance
C
e
in nF, μF
Mains voltage
5
Current system voltage U
N
Partial voltage U+/PE
6
Current partial voltage terminal L1/+ to earth
Partial voltage U-/PE
7
Current partial voltage terminal L2/– to earth
PGH current
8
Current PGH locating current (when the EDS system is
active)
Temperature coupling
10
Current temperature of the coupling L1/+
Temperature coupling
11
Current temperature of the coupling L2/–
Temperature PGH
12
Current temperature of the locating current injector
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