Deactivate Device; Measured Value Transmission To The Control Inputs Of The Inverter; History Memory; Self Test - Bender ISOMETER ISO1685 Series Manual

Function

3.3.4 Deactivate device

When the device is deactivated, the coupling unit of the device is galvanically isolated
from the system being monitored. The device does not measure the insulation resistance.
The IT system is NOT being monitored! The device uncouples itself from the system to be
monitored through an internal system isolating switch.
For example, this allows team operation of inverters, since in interconnected systems
only one insulation monitoring device is allowed to be connected in each system.
For further information see page 25.

3.3.5 Measured value transmission to the control inputs of the inverter

All recorded measured values, operating messages and alarms are made available via the
BMS bus.

3.3.6 History memory

All warnings, alarms and device errors are stored in the internal history memory with date
and time. The time the event started, the time of acknowledgement and end of the event
are recorded.
The history data is copied from the internal EEPROM to the History.csv file on the µSD card
under the following conditions:
• following device start-up
• during operation once an hour
• when a compatible µSD card has been inserted
For the evaluation of the history memory, the Excel tool "iso1685 History.xlsx" can be
made available. By way of example, history memory entries are shown on
11
Function

3.4 Self test

3.4.1 Self test after connection to the supply voltage

Once connected to the supply voltage, all internal measurement functions, the compo-
nents of the process control such as data and parameter memory as well as the connec-
tions to earth are checked. Once the self test is finished, after approx. 5 s the normal
measurement mode begins.
If a device or connection error is detected, the corresponding alarm will be signalled via
the BMS bus as well as via the alarm relay K3 (31-32-34). This relay is continuously opera-
ting in N/C operation, i.e. it de-energises even in case of a complete device failure.
During this self test, when the device is being started, the alarm relays K1 and K2 are not
switched.

3.4.2 Automatic self test

All supply voltages are continuously monitored. The following tests are continuously
carried out in the background:
• Connection E-KE
• Temperature measurement of coupling device and locating current injector
A self test is automatically carried out at 24 hour intervals.
During the automatic self test, the alarm relays are not switched.

3.4.3 Manual self test

The self test is started via the BMS interface by a BMS master with test button.
page 33.
Only in the manual self test mode, the following tests are carried out:
• internal Flash
• CPU register
• Watchdogs
• Oscillator
• Restart of the device including re-initialising and recalibration
During the automatic self test all alarm relays are switched.
iso1685P_D00003_01_M_XXEN / 12.2016