DayTronic 3500 Series, Instruction Manual

Page: 119 / 122

I/O Terminal Logic Function
HI "HIGH" VIOLATION OUTPUT
The "HI" logic output terminal will go to a Logic 1 (0 V-DC) level
whenever the "live" data reading exceeds the current
"HIL" limit
value (see Section 3.a.8 for defining limit zones). If LATCHING is
NOT in effect for
HIL , the "HI" terminal will remain at Logic 1 and
the front-panel red "HI" indicator will remain lit until the "live"
data reading becomes less than the HIGH HYSTERESIS thresh-
old specified by the user (again, see Section 3.a.8). If LATCH-
ING is in effect for
HIL , the "HI" terminal will remain at Logic 1
and the front-panel red "HI" indicator will remain lit regardless of
the subsequent behavior of the "live" data reading, until the
"UNL" logic input terminal ("UNLATCH TRIGGER") has been set
(momentarily) to Logic 0, or until application of a
RELEASE
(RLS) command through the RS-232/485 Interface Port.
LO "LOW" VIOLATION OUTPUT
The "LO" logic output terminal will go to a Logic 1 (0 V-DC) level
whenever the "live" data reading becomes less than the current
"LOL" limit value. If LATCHING is NOT in effect for LOL , the "LO"
terminal will remain at Logic 1 and the front-panel red "LO" indi-
cator will remain lit until the "live" data reading becomes greater
than the LOW HYSTERESIS threshold specified by the user. If
LATCHING is in effect for
LOL , the "LO" terminal will remain at
Logic 1 and the front-panel red "LO" indicator will remain lit
regardless of the subsequent behavior of the "live" data read-
ing, until the "UNL" logic input terminal ("UNLATCH TRIGGER")
has been set (momentarily) to Logic 0, or until application of a
RELEASE (RLS) command through the RS-232/485 Interface
Port.
2 "OK" (NO VIOLATION) OUTPUT
The "OK" logic output terminal will be at a Logic 1 (0 V-DC) level
whenever the "live" data reading is greater than or equal to the
current
"LOL" limit value and less than or equal to the current
"HIL" limit value.
[No. 3] [IN THE STANDARD LOGIC CONFIGURATION, THIS LOGIC I/O
TERMINAL HAS NO ASSIGNED FUNCTION.]
PRINT When the "PRINT" logic input terminal is at Logic 0 (+5 V-DC)
AND the
PRN=ON [CMT] command is in effect, the front-panel
PRINT button will be enabled (see the above section). A transi-
tion at the "PRINT" terminal from a Logic 0 (+5 V-DC) to a Logic 1
(0 V-DC) state when
PRN=ON [CMT] will initiate the transmis-
F.1
S
TANDARD
L
OGIC
C
ONFIGURATION
F
S
TANDARD
L
OGIC
C
ONFIGURATION
Appendix F
Standard Logic Configuration