Modbus Address Tables; Data Types And Access Types; Central Processing Unit Addresses - JUMO mTRON T Manual

NOTE!
These tables are important for external devices that access the central processing unit as a
Modbus master (configured as a Modbus slave). Alternatively, external devices can also ac-
cess the cenral processing unit using the Modbus frames.
7.1

Data types and access types

Data types
Bit x Bit no. x (bit 0 is the lowest bit)
Boolean Boolean value (TRUE or FALSE) can be read or written as a word. The value range is 0 to 1.
Byte 1 byte = 8 bi, can be read or written as word. The value range is 0 to 255.
Word 1 Word = 2 bytes = 16 bits
Int32 Integer (32 bits) = 2 words
Uint32 Unsigned integer (4 bytes) = 32 bits = 2 words
Long Long integer (4 bytes) 32 bits = 2 words
Float Floating point value (4 bytes) acc. to IEEE 754
Char[60] Text with 60 characters, each with 2 characters in a word
Bit field 32 Bit field 32 bits long
Access types
R/O Read only
W/O Write only
R/W Read write
CAUTION!
Write operations to some R/W parameters result in them being saved to the EEPROM or
Flash memory.
The storage components have only a limited number of writing cycles (approx. 10,000 or
100,000), which is why no fast cyclical writing operations should be performed, since there
is otherwise a risk of a storage error in case of a power failure.
7.2

Central processing unit addresses

The following tables contain specifications of all process and device data for the central pro-
cessing unit including their address, data type, and type of access.
Central processing unit - cycle time and device name
Address
Hex. Dec.
0x000A 10
0x009D 157
0x00B0 176
Data type/ Access Signal designation
bit number
Long R/O
Uint32 R/O
Uint32 R/O

7 Modbus address tables

Software version
Modbus master TCP device 1: actual cycle time in 5 ms ticks
Modbus master TCP device 2: actual cycle time in 5 ms ticks
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