Datakom DKM-046, Руководство пользователя

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DKM-046 User Manual V-1.0
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Error codes
Only 3 error codes are used:
01: illegal function code
02: illegal address
10: write protection (attempt to write a read_only register)
Data types
Each register consists of 16 bits (2 bytes)
If the data type is a byte, only the low byte will contain valid d
ata. High byte is don’t care.
For data type longer than 16 bits, consecutive registers are used. The least significant
register comes first.
Commands to the unit are written to below addresses.
If addresses 76 and 77 are left as in the factory setting (value=0) then the the unit will not
ask any password for Modbus commands and Modbus writes.
If any non-zero value is written to register 77, then the unit will require password for
Modbus reads and Modbus writes. If any non-zero value is written to register 76, then the
unit will require password for Modbus reads.
If the value recorded to one of the registers 76 or 77, or 3271 or 3282 is written to the
address 16384, then during next 10 minutes, Modbus area can be written and below
commands can be executed.
All commands (other than the password) may be activated by writing a non-zero value to
the related register.
ADDRESS NAME DESCRIPTION LENGTH R/W DATA TYPE COEFF
16384 Password Programming password 16 BIT W-O unsigned word 1
16385 Reset alarms Reset all existing alarms 16 BIT W-O unsigned word 1
16386 Factory set Return to factory settings 16 BIT W-O unsigned word 1
5.2. COMMANDS