Name: Bender ISOMETER isoRW425
Brand: Bender
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Modbus register assignment of the ISOMETER®

isoRW425_D00052_03_M_XXEN / 02.2017

RW = Read/Write; RO = Read only; WO = Write only

9821 RO

Software version

number

UINT 16 ---

Software

version

9822 RO

Software

version: Year

UINT 16

9823 RO

Software

version: Month

UINT 16

9824 RO

Software

version: Day

UINT 16

9825 RO

Modbus driver

version

UINT 16

Permissi

ons

Description Format Unit Value range

Table of Contents3
Important Information7
How to Use this Manual7
Technical Support: Service and Support8
First Level Support8
Repair Service8
Field Service8
Training Courses9
Delivery Conditions9
Inspection, Transport and Storage9
Warranty and Liability10
Disposal10
Safety Instructions12
General Safety Instructions12
Work Activities on Electrical Installations12
Intended Use13
Function14
Device Features14
Functional Description15
Monitoring of the Insulation Resistance (R Mode)16
Monitoring of the Insulation Impedance (Z Mode)16
Undervoltage/Overvoltage Monitoring17
Self Test/Error Codes17
Malfunction20
Assignment of the Alarm Relays K1/K220
Measuring and Response Times20
Password Protection (On, OFF)22
Factory Setting FAC22
External, Combined Test or Reset Button T/R22
Fault Memory22
History Memory His23
Interface/Protocols23
Installation, Connection and Commissioning25
Installation25
Connection27
Commissioning30
Device Operation31
Display Elements in Use32
Menu Structure33
Menu "AL34
Response Value Setting34
Menu "Out35
Configuration of the Relay Operating Mode35
Relay Alarm Assignment "R1" and "R2" and LED Assignment35
Fault Memory Configuration37
Interface Configuration37
Menu "T38
Time Configuration38
Menu "Set39
Function Configuration39
Measuring Value Display and History Memory40
Data Access Using the BMS Protocol43
Data Access Using the Modbus RTU Protocol44
Reading out the Modbus Register from the ISOMETER44
Command of the Master to the ISOMETER45
Answer of the ISOMETER® to the Master45
Write Modbus Register (Parameter Setting)45
ISOMETER® Answer to the Master46
Exception Code47
Structure of the Exception Code47
Modbus Register Assignment of the ISOMETER48
Device-Specific Data Type of the ISOMETER56
Device Name56
Measuring Values56
Float = Floating Point Value of the Channels57
AT&T = Alarm Type and Test Type (Internal/External)58
R&U = Range and Unit59
Alarm Assignment of the Relays60
Channel Descriptions62
Isodata Data String65
Technical Data67
Tabular Presentation67
Standards, Approvals and Certifications71
Ordering Information71
Index73

Brand	Bender
Model	ISOMETER isoRW425
Category	Measuring Instruments
Language	English

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