Page 39
Module Status - The CTM-530 Status is available from a single 16 bit Modbus holding register at protocol
address 40001. Each bit of the holding register represents a function status of the module. The status bits
are arranged so monitoring only the 3 least signifi cant bits provides the priority status of the module. The
priority status bit states are Normal (All bits zero), Fault (Bit zero active), Short (Bit 1 active) and Alarm
(Bit 2 Active). Each additional bit (3 through 8) provides additional non-essential status information. Bits 9
through 15 are reserved for future use.
Register Name Access Range Type Function Code
Modbus
Address
Decimal Hex
40001 0 0 Status Read Only 1 = Active Word/Bits 03
Status Bits Assignments
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
Menu
Accessed
Alarm
Return
Alarm
Out
Short
Return
Short
Out
Open
General
Alarm
General
Short
General
Fault
Table 1.
Table 2.
Status Bits Event Grid
Menu Access
Alarm Return
Alarm Out
Short Return
Short Out
Open
Alarm
Short
Fault
876543210< Bit
0 0 0 0 0 0 0 0 0 Normal
1 0 0 0 0 0 0 0 1 Normal then > Menu Access
Class B Status Events
0 0 0 0 1 0 0 1 1 Normal then > Class B Short
0 0 1 0 0 0 1 0 0 Class B Alarm
Class A Status Events
0 0 0 0 1 0 0 1 1 Short present on Out, Return Open
0 0 0 1 0 1 0 1 1 Short present on Return , Out Open
0 0 1 0 0 1 0 0 0 Alarm present on Out, Return Open
0 1 0 0 0 1 1 0 1 Alarm present on Return, Out Open
0 0 0 1 1 0 0 1 1 Short present on Out & Return
0 1 1 0 0 0 1 0 0 Alarm present on Out & Return
0 1 0 0 1 0 1 1 1 Short present on Out & Alarm present on Return
0 0 1 1 0 0 1 1 1 Alarm present on Out & Short present on Return
0 1 1 0 0 0 1 0 0 Alarm present on Out & Return
Table 3.
To Next Page
Loading...
Need help?
General
