Rockwell Automation 1405-M620 Operating Instructions User Manual
Page 13
Publication 1405-IN002C-EN-P - November 2004
Bulletin 1405 (M620) Operating Instructions 13
Notes:
•
Registers 0 to 35 contain the named measured values.
•
Registers 18 to 39 represent values as 32 bit DWORD.
•
Registers are organized as “big-Endian”, with first the high-Byte
and then the low-Byte. The transferred bytes are not in a rising
sequence, but the higher register follows after the lower register.
•
Register 40 returns the status of device M620 and status
over/under voltage alarm.
•
Register 41 returns the node address and baud rate.
•
Registers 42 to 49 return diagnostic registers per the Modbus
specifications.
•
Registers 80 and 81 are read/write registers for over/under
voltage parameter.
•
Register 82 is a read/write register for control of M620 functions:
reset I peak, reset E-Counter.
34
68
E3 real energy
DWORD
35
70
36
72
Total Power
DWORD
37
74
38
76
Total Energy
DWORD
39
78
40
80
Status/Alarm
WORD
41
82
Baud/Address
WORD
42
84
Diagnostic 0
WORD
43
86
Diagnostic 1
WORD
44
88
Diagnostic 2
WORD
45
90
Diagnostic 3
WORD
46
92
Diagnostic 4
WORD
47
94
Diagnostic 5
WORD
48
96
Diagnostic 6
WORD
49
98
Diagnostic 7
WORD
80
100
Under Voltage
WORD
81
102
Over Voltage
WORD
82
104
Control
WORD
Table 6 Modbus Memory Map
Register
Byte Low
Metered Value
Data Type