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Table of contents
4
isoBAT425_D00308_04_M_XXEN/07.2020
5. Operation of the device ................................................................. 18
5.4.1 Configuration of the alarm relay operating mode . . . . . . . . . . . . . . . 20
5.4.2 Alarm relay alarm assignment "r1" and "r2" and LED assignment 20
5.7 Measured value display and history memory . . . . . . . . . . . . . . . . . . . . . . . 21
6. Data access using the BMS protocol ........................................... 22
7. Data access using the Modbus RTU protocol ............................ 23
7.1 Reading out the Modbus register from the ISOMETER®. . . . . . . . . . . . . . 23
7.1.1 Command of the master to the ISOMETER® . . . . . . . . . . . . . . . . . . . . . 23
7.1.2 The ISOMETER® answers the master . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.2 Write Modbus register (parameter setting) . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.2.1 Command of the master to the ISOMETER® . . . . . . . . . . . . . . . . . . . . . 23
7.2.2 The ISOMETER® answers the master . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8. Modbus register assignment of the ISOMETER® .......................25
8.1 Device-specific data type of the ISOMETER®. . . . . . . . . . . . . . . . . . . . . . . . .27
Float = Floating point value of the channels . . . . . . . . . . . . . . .27
AT&T = Alarm type and test type (internal/external) . . . . . . .27
R&U = Range and unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
8.1.3 Alarm assignment of the alarm relays . . . . . . . . . . . . . . . . . . . . . . . . . .28
9. IsoData data string .........................................................................30
10. Technical data ...............................................................................31