
7–4 Troubleshooting Your Input Module
2!*(" 1(-, 7 $!/2 /6
The following allows you to run a check on module operation, and
isolate a fault either to the module or external to the module.
Connect the Module in a Simple Test System
Set up a 1771 I/O chassis with a PLC-5 processor in the leftmost
slot.
Switches
Addressing
/$00$# (,
-, /(&'1 "*-0$#
/$00$# (,
-, *$%1 -.$,
*4 60 %%
70*-1
70*-1
0*-1
%%
%%
$1 1'$ "' 00(0 ! ").* ,$ 04(1"' 1- ** -1'$/ ! ").* ,$ 04(1"'$0 1- %%
'(0 0$10 1'$ "' 00(0 1- 70*-1 ##/$00(,&
1
-1$ '$") 1'$ ./-"$00-/ 0"/$$, 1- 3$/(%6 1' 1 1'$ ./-"$00-/ (0 0$1 %-/ 70*-1 ##/$00(,&
*4 60 %%
* "$ 1'$ +-#2*$ (, 1'$ " /# &2(#$0 -, 1'$ 1-. ,# !-11-+ -% 1'$ %(/01 0*-1 ,$51 1- 1'$
./-"$00-/ '$0$ 0*-10 &2(#$ 1'$ 7 +-#2*$ (,1- .-0(1(-,
Important: ..*6 %(/+ $3$, ./$002/$ -, 1'$ +-#2*$ 1- 0$ 1 (1 (,1- (10 ! ").* ,$ "-,,$"1-/
4(,& 1'$ "' 00(0 *-")(,& ! / #-4, (,1- .* "$ 1- 0$"2/$
1'$ +-#2*$0 )$ 02/$ 1'$ *-")(,& .(,0 $,& &$
7 7 7 7 7 "' 00(0 7 7 7 7 $/($0 "' 00(0
*-")(,& 1 !
" /# &2(#$0
+-#2*$
+-#2*$
" /# &2(#$0
*-")(,& ! /
*-")(,& ! / .(,
, . 1'$ "' 00(0 * 1"' -3$/
1'$ 1-. -% 1'$ +-#2*$ 1- 0$"2/$ (1
2
%1$/ (,0$/1(,& 1'$ +-#2*$ (,1- 1'$ 0*-1 ..*6 .-4$/ 1- 1'$ "' 00(0
7 /-"$00-/
7 /-"$00-/
CheckingModule
Operation
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