1MRS750881-MUM
REC 523
53
Remote Monitoring and Control Unit
Technical Reference Manual
In REC 523, the ABB-specific solution for substation communication is supported
by foreign messages. In short, the communication method consists of session control
(REC 523 can maintain up to 4 sessions), a sliding window protocol for application
acknowledgement and definition of data formats.
The REC 523 unit also supports explicit SPA messages which may be used for
parametrization purposes. This method is also defined in the LON Application
Guidelines document.
6.4.1.
Network variable indexes of REC 523
Table 6.4.1-1
Network variable indexes
NV
index
Dir. SNVT_Type
SNVT
number
Object
Type
Comments
0...15
IN
SNVT_state
83
16 bit INT
Virtual IEC 61131 inputs
(Relay Configuration Tool def.
COMM_IN_1...16)
16...31
OUT SNVT_state
83
16 bit INT
Virtual IEC 61131 outputs
(Relay Configuration Tool def.
COMM_OUT_1...16)
32... 47
IN
SNVT_state
83
16 bit INT
Virtual IEC 61131 inputs (Relay
Configuration Tool def.
COMM_IN_17...32)
48... 63
OUT SNVT_state
83
16 bit INT
Virtual IEC 61131 outputs
(Relay Configuration Tool def.
COMM_OUT_17...32)
64
IN
SNVT_elapsed_tm
87
structure
Throttle input
(see description in text)
65
IN
SNVT_elapsed_tm
87
structure
Timeout input
(see description in text)
66
OUT SNVT_alarm
88
structure
Alarms to receiver 1
67
OUT SNVT_alarm
88
structure
Alarms to receiver 2
68... 77
OUT SNVT_state
83
16 bit INT
User-definable outputs
LM_STA_x (generated from
internal process value types
1,2,3 or 16 bits)
78... 87
OUT SNVT_count_inc_f
52
IEEE754
float
User-definable outputs
LM_CNT_x (generated from
internal process value type
float)
88... 97
OUT nv_32bit_analog
252
32 bit INT
User-definable outputs
LM_ANA_x (generated from
internal process value type 32
bit (=any type))
100...
115
IN
SNVT_state
83
16 bit INT
Virtual IEC 61131 inputs (Relay
Configuration Tool def.
COMM_IN_33...48)
116...
131
OUT SNVT_state
83
16 bit INT
Virtual IEC 61131 outputs
(Relay Configuration Tool def.
COMM_OUT_33...48)
