Amada WELD CHECKER MM-400A - (2) NO CURR Operation

MM-400A
11. Timing Chart
11-2
(2) NO CURR Operation
The no current judgment function can be used by using the NO CURR signal.
When the no current error is detected, NO CURR and NG are output.
*1
*3
*4
*2
*4
*5
*6
*9
*7 *8
*7 *8
*10
When the welding current does not flow
NO CURR
NO CURR
NG
Welding current
(input)
(output)
(output)
*1
*3
*4
*2
*
4
*5
*9
*7 *8
*7 *8
*1
1
NO CURR
N
O CU
RR
Wel
ding
cur
rent
(input)
(output)
(output)
NG
Whe
n the
weldi
ng cu
rre
nt f
low
s
*1: No current monitoring start
After the NO CURR signal is closed, the no current monitoring is started at the
time set for INPUT DEBOUNCE TIME in the EXT INPUT/OUTPUT (4) screen +
2 ms. (Refer to Chapter 8, “o-3. EXT INPUT/OUTPUT (4) Screen.”)
The required time is at least 3 ms in “1ms” and 12 ms in “10ms.” Close the NO
CURR signal before measuring start.
*2: No current monitoring end
After the NO CURR signal is opened, the no current monitoring is ended at the
time set for INPUT DEBOUNCE TIME in the EXT INPUT/OUTPUT (4) screen +
2 ms and judgment is performed. (Refer to Chapter 8, “o-3. EXT
INPUT/OUTPUT (4) Screen.”)
The time is 3 ms in “1ms” and 12 ms in “10ms.”
*3: NO CURR input time (No current monitoring start)
After the NO CURR signal is closed, closing of the NO CURR input is
established at time set for INPUT DEBOUNCE TIME in the EXT
INPUT/OUTPUT (4) screen. (Refer to Chapter 8, “o-3. EXT INPUT/OUTPUT (4)
Screen.”)
The time is 1 ms in “1ms” and 10 ms in “10ms.”
*4: No current monitoring processing time