Shihlin SDH Series, Руководство пользователя

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136
SDH Series Manual
PD25 ITST
(■)
Digital input status
Digital input contacts (total of 12 points) are determined by the
setting methods of digital. The digital input status of PD25 that
bit 0 ~ 11 corresponds to DI1~DI12 at the time of communication
control.
Bit binary representation 0: digital input contacts OFF
1: digital input contacts ON
The DI input signal can come from external terminal (DI1 ~
DI12) or software PD25 (Bit 0 ~ 11 of corresponding parameter
PD25) and is determined by PD16.
If the PD16 corresponding bit is 1, then the source is software
DI (PD25). Otherwise, from hardware DI.
Read PD25 value as 0x0011 means DI1 、 DI5 is ON at the end.
Write PD25 value as 0x0011 means DI1 、 DI5 is ON while com -
munication, but doesn’t mean the final digital input of DI1 and
DI5 is ON. It is determined by PD16.
Digital input The function planning of DI (DI1~DI8) please refer
to PD02~PD09 ； DI9~DI12 please refer to PD21~PD24.
Example 1 :
When PD16 is 0FFFh and PD25 is 0000h, the status of
DI1~DI12 is all controlled by communication contact. When
DI1~DI12 is all OFF, all external hardware terminals DI1~DI12
and SG break over, digital input signals will not be affected, all
controlled by communications contacts, all digital input contacts
DI1~DI12 still OFF.
Example 2 :
External hardware terminal DI12~DI1 represented by bit11~bit0.
Bit binary for description :bit11~bit0 represent DI12~DI1 (left to
right)
Digital input contact source switch (PD16): 111111000000
External hardware terminal status: 111100001111 (1 represent
ON
，
0 represent OFF)
Communication control digital input contact status (PD25):
111000111000
Pr.Pt
S.T
0000h
0000h
~
0FFFh
-