56
GF 9950-10 Six Channel Transmitter
Multiple
Example
: Set Relay 1 Mode to A | B | C. "This relay will activate IF channel 1 pH falls below 6, OR if channel 2 pH rises above 7.8,
OR if binary input 1 is active (On or Closed). Relay #1 will activate 30 seconds after any one the conditions are met".
Condition A:
The pH on Channel 1 is less than 6
Condition B:
The pH on Channel 2 is greater than 7.8
Condition C:
Binary Input 1 is On
On
Delay:
30
When operating properly, all three of these conditions are FALSE. If any one of them becomes TRUE, then Relay 1 will be activated.
Relay 1 will remain activated until the TRUE condition becomes FALSE again, including the hysteresis band.
Relay source display allows operator to scroll thru relay 1 -4 on base unit and A-D on the external relay module.
External relays that are located in the 8059 External Relay module are limited to the basic relay modes as shown in the chart.
(ALL) Select source for each Relay 1 - 4 (relay base unit) or RELAY A, B, C and D (external 8059 relay
module). Choose PRIMARY (CH 1-6), SECONDARY (CH 1-6), BINARY 1 - 4, DERIVED FUNCTION 1 - 4,
TIMER, or MULTIPLE. Secondary Values are only available for pH, Conductivity/Resistivity, Level, Salinity
and Dissolved Oxygen. Derived Functions are only available when Derived Functions (CH 1-4) are enabled
in the OPTIONS menu.
(ALL) Select the desired mode of operation to switch the Relay state (ON / OFF). Modes avaliable OFF,
LOW, HIGH, WINDow IN, WINDow OUT, PROP PULSE, VOL PULSE, PWM, TOTAL, USP and ERROR.
(Refer to page 18, Relay Modes). Default = OFF. When MODE is set to ERROR, relay energizes if sensor
problem is detected on any channel. ON DELAY delays the energizing of the relay until after the programmed
delay time.
MULTIPLE will use up to 3 sources where the relay will only be activated if these sources meet speci
fi
ed
conditions
A | B | C
,
A & B & C
,
A | (B & C)
,
A & (B | C)
Default = OFF
MULTIPLE mode A | B | C will activate if ANY conditions A, B or C are true.
MULTIPLE MODE A & B & C will ONLY activate if all conditions A, B and C are true.
MULTIPLE MODE A (B & C) will activate if A is true OR if B and C are true.
MULTIPLE MODE A (B | C) will activate if A is true AND if B or C are true.
RELAY Menu
RELAY 1
CH 1 PRIMARY
SOURCE
RELAY 1
OFF
MODE
RELAY 1
MULTIPLE
SOURCE
RELAY 1
A | B | C
MODE
RELAY 1
A & B & C
MODE
RELAY 1
A | (B & C)
MODE
RELAY 1
A & (B | C)
MODE
When the Relay Source is set to MULTIPLE, four Boolean logic formulas called "Relay Operators" are available.
Relay operators monitor three different input sources (sensor or binary input) based on the conditions set up by the end user
(HIGH or LOW conditions or binary input ON or OFF) to activate a relay.
The relay will only be activated when the complete formula is satis
fi
ed.
•
A TRUE condition means that the sensor's condition is beyond the setpoint.
•
A FALSE condition means that the sensor's condition is within the setpoint.
•
If any one of the three conditions shows CHK SENSOR then that condition will be treated as always FALSE.
