- 511 -
(ii) Wide (N=3) communication
Figure 2.37-3 shows the Wide frames in the IEEE C37.94 standard as N=3†. When Wide is
applied, sub-communication channels are provided at bits: COM1(2bits), COM2(2bits),
COM3(2bits), COM4(2bits), and COM6(6bits). The use of the sub-communication channels are
not restricted, hence the user can use them for sending user-wishing data.
SCOM1
MS0
RA0
MS0
RA3
MS0
Spare
MS0
RA0
MS0
RA3
MS0
Spare
SCOM2
MS1
RA1
MS1
RA4
MS1
Spare
MS1
RA1
MS1
RA4
MS1
Spare
SCOM3
MS2
RA2
MS2
RA5
MS2
Spare
MS2
RA2
MS2
RA5
MS2
Spare
SA0
SA1
SA2
SA3
SA4
SA5
SA6
SA7
SA8
SA9
SA10
SA11
Figure 2.37-3 Sub communication channels at N=1,2, and 3† in C37.94 for 1CB
†Note: Set Wide for scheme switch [CH*_COM_WIDTH]. For more information, see
Chapter
Relay application: Transmission control
.
‡Note: Three bits in the COM2 (1–3) are pre-assigned for sending signals “CBDS-A, -B,-
C”.