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Appendix 3 Modbus RTU communication function code table
Functional
address
meaning
Register attribute
4x0000
Parameter: P01
4 bytes, signed, read /
write
4x0002
Parameter: P02
4 bytes, signed, read /
write
……
4x0176
Parameter: P89
4 bytes, signed, read /
write
4x0178
Parameter: P90 (gross weight of scale 2)
4 bytes, signed,
read-only
4x0180
Parameter: P91 (net weight of scale 2)
4 bytes, signed,
read-only
4x0182
Parameter: P92 (tare weight of scale 2)
4 bytes, signed, read /
write
4x0184
Parameter: p93
4 bytes, signed, read /
write
4x0186
Parameter: p94 (pulse port count value)
4 bytes, signed, read /
write
4x0188
Parameter: p95 (No.1 4-20mA output value)
4 bytes, signed,
read-only
4x0190
Parameter: P96 (No.2 4-20mA output value)
4 bytes, signed,
read-only
4x0192
Parameter: p97 (4-20mA input value)
4 bytes, signed,
read-only
4x0194
Parameter: p98
4 bytes, signed, read /
write
4x0196
Parameter: p99
4 bytes, signed, read /
write
4x0198
Bit 1
Output relay out1 status
2, no sign
Bit 2
Output relay out2 status
…
…
Bit 16
Output relay Out16 status
4x0199
Bit 1
Input in1 status
2, no sign
Bit 2
Input in2 status
…
…
Bit 12
Input in12 status
Bit 13
Output relay out17 status
Bit 14
Output relay out18 status