Process Sensors Sensor Therm METIS M311 Operating Manual page 41

METIS M311 / M322 / H311 / H322 (12-pin)
- Targeting light on/off: (only available with
equipment laser targeting light): Switches ex-
ternally on or off the laser targeting light.
- Parameter selector (also see
ups): For selection and activation of up to 7
pyrometer configurations (incl. control pa-
rameters at devices with PID controller).
- The inputs are binary coded, that is:
- with one digital input only one Setup can
be activated
- with 2 digital inputs there are 3 Setups
available
- using all 3 inputs, 7 Setups can be accessed and activated
|INFO|
Should for example the controller be activated and started externally via a digital input, this in-
put is obviously as parameter selector no longer available and with 2 inputs there are only 3 pyrometer
configurations left.
Additionally when equipped with a PID controller:
- Activate controller: The control process is activated as long as voltage at
the terminal is present.
- Start/stop controller: Each pulse starts or stops (alternating) the controller.
At all inputs:
- Time settings: A debounce time can be selected, that is, a period the signal at least must be pre-
sent at an input to be detected.
 Digital output mode. Output of a switching signal:
- No function: The output is deactivated (settings right beside have no function).
- Ready to use contact: Device is ready and error free after self-test.
- Material contact (only M3) for detecting whether a hot part is in the measuring
field: The limit switch contact is switching, when the beginning of the tempera-
ture range is exceeded by 1% of the temperature range span (the clear time of
the peak picker has to be set to ≥1 s or to Auto).
- Limit switch contact: if a certain temperature is exceeded or falling below a
threshold.
- Signal strength contact: Signal strength too low (for use as dirty window alarm: identifies the degree of
contamination of the optics or a window or detects interferences (dust ...) in the beam path and trigger an
alarm if activated).
- Device temperature: When exceeding the maximum internal device temperature.
Additionally when equipped with a PID controller:
- Setpoint limit 1 / Setpoint limit 2: The setpoint limit is a limit temperature above
or below the setpoint temperature that should not exceeded or to be below. Two
setpoints can be defined. The output is activated if the measured value exceeds
the defined setpoint value. The output is also activated if the measured value
falls below the defined value. Entry of the setpoint value has to be done relative
to the setpoint, positive or negative, e.g. 20°C if the setpoint value is 800°C and
the output should be active at 820°C. Values will be entered in the PID controller
form (see 7.3.3).
- Setpoint band: The setpoint band is composed of the 2 setpoint
limits and defines a range within the temperature has to be. The
output is activated if the measured value is outside the defined
value.
- Controller active: Output is active if controller is active.
- Successful control: Output is active when a control process is
terminated (a possibly hold time has elapsed).
Setups
that can be
activated
7.3.5 Set-
1
2
4
1,2,3
1,4,5
2,4,6
1,2,3,4,5,6,7
Digital Input
Active
(x = function active)
Setup
1 2 3
x – – 1
x
– – 2
x
– – 3
x x – 4
x – x 5
x x
– 6
x x x
7
...
Activate controller
Start/stop controller
No function
Contact ready to use
Material contact
Limit switch contact
Signal strength
Device temperature
...
Setpoint limit 1
Setpoint limit 2
Setpoint band
Controller active
Successful control
Setpoint limit 1
Setpoint band
Measured value
Setpoint limit 2
Digital Input
(x = input active)
1 2 3
x – –
x
– –
x x
–
– – x
x – x
x x
–
x x x
Function
Function
v
Function
Example
41