Advantech PCA-6180 Series, Руководство пользователя

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110 PCA-6180 User's Manual
Wa tchd o g Tim e r Re g iste rs
Ad d re s s o f
re g is te r (2 E )
Attrib u te
R e a d /W rite
Va lu e (2 F ) a n d d e s c rip tio n
8 7 (he x) -----
W rite this a d d re ss to I/O a d d re ss p o rt
2 E (he x) twice to unlo ck the W 8 3 6 2 7 HF
0 7 (he x) write
W rite 0 8 (he x) to se le ct re g iste r o f
wa tchd o g tim e r.
3 0 (he x) write
W rite 0 1 (he x) to e na b le the functio n o f
the wa tchd o g tim e r. D isa b le d is se t a s
d e fa ult.
F 5 (he x) write
S e t se co nd s o r m inute s a s units fo r the
tim e r.
W rite 0 to b it 3 : se t se co nd a s co unting
unit. [d e fa ult]
W rite 1 to b it 3 : se t m inute a s co unting
unit
F 6 (he x) write
0 : sto p tim e r [d e fa ult]
0 1 ~F F (he x): The a m o unt o f the co unt,
in se co nd s o r m inute s, d e p e nd s o n the
va lue se t in re g iste r F 5 (he x). This
num b e r d e cid e s ho w lo ng the
wa tchd o g tim e r wa its fo r stro b e b e fo re
g e ne ra ting a n inte rrup t o r re se t sig na l.
W riting a ne w va lue to this re g iste r ca n
re se t the tim e r to co unt with the ne w
va lue .
F 7 (he x) re a d /write
B it 7 : W rite 1 to e na b le m o use to re se t
the tim e r, 0 to d isa b le [d e fa ult]
B it 6 : W rite 1 to e na b le ke yb o a rd to
re se t the tim e r, 0 to d isa b le .[d e fa ult]
B it 5 : W rite 1 to g e ne ra te a tim e o ut
sig na l im m e d ia te ly a nd a uto m a tica lly
re turn to 0 . [d e fa ult=0 ]
B it 4 : Re a d sta tus o f wa tchd o g tim e r, 1
m e a ns tim e r is "tim e o ut".
A A (he x) -----
W rite this a d d re ss to I/O p o rt 2 E (he x)
to lo ck the wa tchd o g tim e r.
Table A-1: Watchdog timer registers