Siemens PANEL PC 877 ユーザーズマニュアル
Detailed descriptions
17.2 Bus board
SIMATIC Panel PC 877
17-28
Operating instructions, Release 07/2006, A5E00877780-01
Pin No.
Abbreviation
Type*
Pin No.
Abbreviation
Type
C1
-SBHE
O
D1
-MEMCS16
I
C2
LA 23
I/O
D2
-IOCS16
I
C3
LA 22
I/O
D3
IRQ 10
I
C4
LA 21
I/O
D4
IRQ 11
I
C5
LA 20
I/O
D5
IRQ 12
I
C6
LA 19
I/O
D6
IRQ 13
I
C7
LA 18
I/O
D7
IRQ 14
I
C8
LA 17
I/O
D8
-DACK0
O
C9
-MEMR
I/O
D9
DRQ 0
I
C10
-MEMW
I/O
D10
-DACK5
O
C11
SD 08
I/O
D11
DRQ 5
I
C12
SD 09
I/O
D12
-DACK6
O
C13
SD 10
I/O
D13
DRQ 6
I
C14
SD 11
I/O
D14
-DACK7
O
C15
SD 12
I/O
D15
DRQ 7
I
C16
SD 13
I/O
D16
+ 5V
VCC
C17
SD 14
I/O
D17
-MASTER
I
C18
SD 15
I/O
D18
0 V
GND
Under normal conditions, the signals -SBHE, LA17 - LA23, -MEMR and MEMW are operated
as outputs (sending from the CPU). Only CPU modules which are suitable for use as a
master CPU for system bus access send and receive these signals. A minus sign “-” in front
of the signal name shows that the signal is LOW active.