Download 3500 Process Controller HA027988_15_3500

3500 Series Controllers
10.3.2
User Manual
Single Isolated Logic Output
This provides isolation from other IO and should be used, for example, in applications where the
sensor and the output device may be at supply potential. It is only available as a time proportioning
or on/off output.
List Header - Mod
Sub-headers: xA
Name
Value
Parameter Description
Press
to
select
Default
or
to change values
Access
Level
Ident
Channel type
Logic Out
Logic output
L3 R/O
IO Type
To configure the function of the
relay
OnOff
On off output
Conf R/O
L3
Sets the sense of the logic
output.
This only applies if the output is
configured as OnOff
No
Non inverted. Output off (logic 0)
when PID demand off. For control this
is when PV>SP.
Output on (logic 1) when PID demand
off. For control this is when PV<SP.
This is the normal setting for control.
Yes
Inverted. Output off (logic 0). For an
alarm this is when the alarm is active.
Output on (logic 1). For an alarm this
is when the alarm is in-active.
This is the normal setting for alarms.
Off
The output will drive to 'electrical low'
value regardless of the 'Invert'
parameter.
On
The output will drive to 'electrical high'
value regardless of the 'Invert'
parameter.
Cont
The output will assume a status
according to how it is driven
0
1
Off (if ‘Invert’ = ‘No’)
On (if ‘Invert’ = ‘No’)
L3 R/O
Output off (if ‘Invert’ = ‘No’)
Conf
R/O L3
Invert
SbyAct
See also
section 8.2.1.
Standby action. Determines the
output action when the
instrument is in Standby Mode.
Time Prop Time proportioning output
Meas Value
Current state of the output
PV
Normally wired to the output of a 0
function block such as PID output
1
to control a plant actuator
Status
Module status
See note 2 - section 10.3.1
OK
Conf R/O
L3
Off
Output on (if ‘Invert’ = ‘No’)
Alterable if not wired
Normal operation
Conf
R/O L3
R/O
The next six parameters are only shown when ‘IO Type’ = ‘Time Prop’ outputs
CycleTime
To switch the output on and off
See also
within the set time period.
section 8.2.2. Applies only to Time
Proportioning outputs.
Off or 0.01 When Off is selected the Min OnTime
to 60.00
algorithm will run.
seconds
When set to any value the CycleTime
algorithm will run.
The minimum time (in seconds)
that the logic output is on or off.
Applies only to Time
See also
section 8.2.2. Proportioning outputs and is
only available when ‘Cycle Time’
= Off
Auto
0.01 to
150.00
seconds
If set to Auto the minimum on time will Auto
be 110mS.
If the logic is used to control an
external relay, Min OnTime should be
set to a minimum of (say) 10 seconds
to prevent the relay from switching too
rapidly.
Res’n
Display resolution.
This sets the number of decimal
places displayed by Disp Hi and
Disp Lo parameters
XXXXX
XXXX.X
XXX.XX
XX.XXX
X.XXXX
No decimal points
One decimal point
Two decimal points
Three decimal points
Four decimal points
XXXXX
Conf
Disp Hi/Lo
Maximum/minimum output
demand signal
0.00 to
100.00
100.00
L3
Range Hi/Lo
Electrical output high/low
0.00 to
100.00
These parameters allow high and low
limits to be applied to the output
against a set limit of the output
demand signal from the PID loop.
See also section 10.4.3.
Meas Value
The current status of the digital
output.
0
1
Min OnTime
Part No HA027988
Issue 15
Jun-13
On (unless Invert = Yes)
Off (unless Invert = Yes)
Off
L3
L3
L3
L3
R/O L3
101