5-2
Section
Read Operation in SYNC Mode
64
5-2
Read Operation in SYNC Mode
In SYNC mode, a trigger (TRG) input is awaited after the V600-HAM42-DRT’s
power is turned ON. The read or retry access is executed immediately following
the TRG input. If a Data Carrier is in the transmission area at that time, the proc-
essing results will be output during the time set by DIP switch 2. If no Data Carrier
is in the transmission area, this will be detected and treated as a “No Data Carri-
er” error.
Data Carrier position
Data Carrier accessed
Address input
TRG input
HS output
NORMAL output
R/W input
ERROR output
Data output
Data input
Data LED indicators
Address designation input
All 0
Data (1)
Error (2)
Data (3)
Previous data output
None
lit
Data (1) display
Read executed (1)
Read executed (2)
(Error occurs)
Read executed (3)
All 0
All 0
None
lit
Data (2) error
display
None
lit
Data (3) display
t
sync
Inside the area
Inside the area
Outside the area
“0”
Don’t Care
t
sync
t
sync
The output time t
sync
is 100 ms when pin 1 of DIP switch 2 (output mode) is OFF,
and 500 ms when it is ON.