Read/Write Memory – Read List
How to Use the Read/Write Memory List
Register Address
Addresses for read/write memory, not shared with read-only memory.
Register Length
Length of the register variable.
Memory Content Name
Describes the name or purpose of the memory content. Linked names go to that parameter's own page for full option values, ranges, and setup steps.
Data Type
Specifies the format of transmitted or received data.
Read Command
Indicates the available read commands.
Write Command
Indicates the available write commands. A value of X in this column means remote writing is not supported for that register.
Read-Write Memory List
0x0502
1282
41283
1
sim on – reserved
const
03
X
0x0503
1283
41284
1
sim pulse – reserved
const
03
X
Example: C02 Del. Total (clear/reset totalized flow)
Table Register Address (Hex)
0x0201
Converted to decimal
0x0201 = 2×256 + 1 = 513
Master address to enter (4xxxx convention)
40001 + 513 = 40514
Address bytes in the frame
02 01
Full write frame (station 01)
01 06 02 01 00 01 18 72
If 40201 is entered by mistake, the master sends decimal 200 (0x00C8) — an address that doesn't exist. The flow meter won't respond, or may return exception code 02; on the PLC side this appears as "no response to write."
Self-verification tip
If you're not sure which address convention your master uses, first use function code 03 to read the register that corresponds to Modbus ID. If the value read back matches the device's own station number, the address base is correct and you can safely apply the same convention to the other addresses.
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