DR. JOHANNES HEIDENHAJN GmbH
D-8225 Traunreut .Tel. (08669) 31-O
SERVICE MAWAI. TNC 151/155
Page 31
Kundendienst
Se&ion 2.2.6
9)
GY El
"PC INSTRUCT DECODER, ACCU-FF TEST"
The circuitry used for decoding and carrying out the PLC
instructions is tested.
h) Key q
"INPUT/OUTPUT TEST 1. PC BOARD" (only with Q versions)
The PIh: I/O Board outputs are resistively loaded and connec-
ted to the inputs by means of the PLC Burn-In Adapter. Each
output is connected to 2 inputs. By writing "1"s to the out-
puts,
and checking the corresponding inputs, the Control is
able to deduce whether a fault is on an input or an output.
If a fault is detected (a "0" on an input) the input condi-
tions are displayed on the VDU:
eg. :
"INPUT/OUTPUT TEST 1. PC BOARD
INPUT/OUTPUT FAILURE"
INPUT 01234567890123456789
0 01111111111111111111
20 11111111111001111111
40 11111111111111111111
60
1111
AX -- EX, EY
23
always
Input 31 is used to monitor a 20 ms monostable pulse genera-
ted on the Emergency Off output. If the duration of this
pulses falls outside its tolerance limits, a fault condi-
tion will be displayed:
eg. :
"MONOFLOP TIME TOO SHORT
20MS”
This pulse can be generated manually by individual presses
of the key j- or,
u
repetitively, by pressing the key twice in
quick succession. This repetitive mode will be indicated by
a -1" at input position 31 on the VDU.
TO aid in locating an I/O fault, each output can be driven
individually. By pressing the key
El
(after a short delay) the VDU will display the input condi-
tions when only output 0 is being driven high.
s)
QY
El
"TEST DYNAMIC RAM CLP GRAPHICS BOARD"
h) Key
ccl
"TEST VIDEO RAM CLP GRAPHICS BOARD"
i) Key
q
"PC INSTRUCT DECODER, ACCU-FF TEST"
The circuitry used for decoding and carrying out the PIG
instructions is tested.
j) Key
,m
"INPUT/OUTPUT TEST 1. PC BOARD" (only with Q versions)
The PLC I/O Board outputs are resistively loaded and con-
nected to the inputs by means of the PLC Burn-In Adapter.
Each output is connected to 2 inputs. By writing "1"s to
the outputs, and checking the corresponding inputs, the
Control is able to deduce whether a fault is on an input
or an output. If a fault is detected (a "0" on an input)
the input conditions are displayed on the VDU:
eg. :
"INPUT/OUTPUT TEST 1. PC BOARD
INPUT/OUTPUT FAILURE"
INPUT
01234567890123456789
0
01111111111111111111
20
11111111111001111111
40 11111111111111111111
60
1111
AX --
EX, EY
\
a.;.:
Input 31 is used to monitor a 20 ms monostable pulse ge-
nerated on the Emergency Off output. If the duration of
this pulses falls outside its tolerance limits, a fault
condition will be displayed:
eg. :
"MONOFLOP TIME TOO SHORT ZOMS"
This pulse can be generated manually by individual presses
of the key@+, repetitively, by pressing the key twice
in quick succession. This repetitive mode will be indica-
ted by a
"1" at input position 31 on the VDU.
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