21
4 Modbus addresses
Data type,
type of access
The following tables contain specifications of all process and device data
including their addresses, data type and type of access.
Meaning:
R/O Read only access
W/O Write only access
R/W Read/write access
INT Integer (8 or 16 bit)
Bit x Bit No. x (bit 0 is always the bit with the lowest value)
LONG Long integer (4 byte)
FLOAT Float value (4 bytes) as per IEEE 754
TEXT4 Text 4 characters
4.1 Process data
A
Write operations to R/W parameters result in them being saved to
the EEPROM. These memory modules only have a limited number
of write cycles (approx. 100000). For this reason, this function can
be switched off in the case of frequent programming. The
parameter values are then only saved in the volatile memory (RAM)
and will be lost after a supply failure.
v
Setup program (undocumented parameters -> Bit parameters
-> Set parameter 2)
Address Data type/
bit number
Access Signal designation
0x001F INT R/O Internal binary values
Bit 12 Binary value L1 (= 0x1000)
Bit 13 Binary value L2 (= 0x2000)
0x0020 INT R/O Controller status
Bit 12 Manual mode active (=0x1000)
Bit 15 Self-optimization active (=0x8000)
0x0021 INT R/O Binary outputs 1...4
(Switching states 0 = off / 1 = on)
Bit 0 Output K1: Relay (= 0x0001)
Bit 1 Output K2: Relay (= 0x0002)
Bit 2 Output K3: Logic (= 0x0004)
Bit 3 Output K4: Relay (= 0x0008)
0x0023 INT R/O Binary inputs 1 and 2
(Switching states 0 = open / 1 = closed)
Bit 0 Input 1 (= 0x0001)
Bit 1 Input 2 (= 0x0002)
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