Special functions for coupled IT systems
Special functions for coupled IT systems
isoHR685W-x-I-B_D00261_05_M_XXEN/12.2021
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11.4 ISOloop
Ring systems are a special type of coupled systems in which all systems can be coupled
to form a ring interconnection. The ISOloop function ensures that, in a system with seve-
ral insulation monitoring devices, one device is always actively measuring. The devices
that work in an ISOloop configuration are combined into a group. Within the group,
digital inputs are used to control which devices are currently working together in a team.
Within the team, the device with the lowest BCOM address takes over the measuring task.
If the systems are coupled via the coupling switches, the devices receive a signal via the
digital input informing them that they are now working together as a team. If only the up-
per coupling switch is closed, device 1 and device 2 are in a team and device 1 takes over
the measuring task. If all coupling switches are closed, all four devices are in one team and
device 1 takes over the measuring task.
PGH ON
PGH ON
PGH ON
PGH ON
Switch
1
2
4
3
The measuring device with the lowest BCOM address in a team (in the example, device 1)
distributes its currently measured insulation value to all team members (here device 2).
The parameter "Measured value subscription" can be used to define whether this shared
measured value is to be shown on the respective device. If this function is activated, de-
vice 2 would also report an insulation alarm 1 and 2 based on the selected alarm thres-
holds. This function is activated by default.
The basis of the ISOloop function is the combination of several ISOMETER®s to form an in-
terconnection. The grouping of up to 10 ISOMETER®s is carried out with a separate soft-
ware, the
BCOM Group Manager
. The program can be downloaded from the Bender
website at www.bender.de/service-support/downloads or via the web server ("Menu" >
"Settings" > "File" \wwwroot\groupcfg.zip). The tested setup file can be executed on any
Windows PC in the network.
11.4.1 Preparing the devices in an interconnection
In order to enable the cooperation of different devices within an interconnection, each
device must be provided with a valid BCOM address. The respective system name must
be configured uniformly for all devices.
Information on the configuration of BCOM in the device menu can be found in chapter
9.2 (6.3.3) BCOM. Information about BCOM can be found in chapter 10.2 BCOM in this ma-
nual and in the BCOM manual (D00256) at
http://www.bender.de/service-support/downloads
Parallel operation ISOnet and ISOloop
ISOnet and ISOloop should not be activated simultaneously since the two
functions are opposed. In ISOnet mode, the measuring task is assigned cy-
clically to all devices in the system, while in ISOloop mode, the measuring
task is always assigned to the device with the lowest address within a de-
fined interconnection.
BCOM system name configuration
All devices in the interconnection must have a common device name.
