Gossen MetraWatt P1500, Руководство по эксплуатации

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7.8 Trigger Inputs
Function
• Floating optocoupler inputs TRG 1

and TRG 2

allow for
remote control of a device function with the help of a binary
signal.
• The function to be controlled is selected by manually or
digitally configuring the trigger mode
(SEtUP/dPYIF/AnIF/trG 1 txt or SEtUP/dPYIF/AnIF/trG 2 txt).
Connection
• Connect the control signal between TRG 1(2) + and
TRG 1(2) –.
Signal level:
Low signal: – 18 V

Us

+ 1 V
High signal: + 4 V

Us

+ 18 V
Current consumption: Is = (Us – 2 V) / 1.47 k

• The TRIGGER input can be driven with the + 15 V output at
the analog interface via any desired switch (figure 7.8).
Warning!
Trigger inputs TRG 1

and TRG 2

are floating inputs
and are functionally isolated from the output current
circuit. This functional isolation is not equivalent to
“safety separation” as specified in electrical safety
regulations.
Note
The trigger inputs are sampled by the digital control unit
approximately every 10 ms. After a signal change has been
detected, repeated querying ensues at short time intervals
(suppression of switch bouncing and interference pulses). This
means that:
• Trigger signal pulses must have a minimum duration of 14 ms
in order to assure reliable recognition.
• A delay of 1 to 15 ms may occur between application of the
control signal and triggering of the controlled function.
Connection
Figure 7.8 Controlling the Trigger Input with a Switching Element / Exter-
nal Signal
Trigger Function Setting Parameters
PSP-KONSTANTER
Einstellung
USET = Usoll
ISET = Isoll
OUTPUT ON
T-MODE
z OFF
Analog Interface
TRG 1 + 1
TRG 1 - 2
TRG 2 + 3
TRG 2 - 4
SIG 1 + 5
SIG 1 - 6
SIG 2 + 7
SIG 2 - 8
SIG 3 + 9
AGND 2 10
+15V 11
AGND 1
12
Uext + 13
Uext - 14
Iext + 15
Iext - 16
U MON 17
I MON 18
SENSE + 19
SENSE - 20
+OUT
- OUT
Last
Rbel
Us
PSP-KONSTANTER
Einstellung
USET = Usoll
ISET = Isoll
OUTPUT ON
T-MODE
z OFF
Analog Interface
TRG 1 + 1
TRG 1 - 2
TRG 2 + 3
TRG 2 - 4
SIG 1 + 5
SIG 1 - 6
SIG 2 + 7
SIG 2 - 8
SIG 3 + 9
AGND 2 10
+15V 11
AGND 1
12
Uext + 13
Uext - 14
Iext + 15
Iext - 16
U MON 17
I MON 18
SENSE + 19
SENSE - 20
+OUT
- OUT
Last
Parameters Meaning
OFF Trigger input function is deactivated, trigger signals have no
effect.
OUT OUTPUT Trigger signal acts upon the OUTPUT: output on/off.
Low OUTPUT depends upon manual setting or programming
command.
Edge
Low

High
OUTPUT remains OFF or OUTPUT is switched OFF.
High OUTPUT is OFF and cannot be activated (neither manually
nor by means of a program command).
Edge
High

Low
The OUTPUT is activated; exception: OTP or OVP.
SQS Step
function Memory recall (step-by-step sequence control)
Edge
Low

High
Start trigger signal
High – The trigger signal is a high pulse with a duration of less
than 800 ms.
– A high pulse with a duration > 1.0 s resets the address
counter to the start address at any point in time, and
execution begins with the next trigger signal.
Edge
High

Low
The high

low edge of the (short) trigger signal results in
step-by-step control of the currently selected sequence,
regardless of the specified time and number of repetitions.
Recall of the memory’s contents begins with the START
address. Each trigger signal increasers the address by 1,
until the STOP address is reached. The next pulse once
again causes execution of the contents of the START
address.
SEQ SEQUENCE Sequence execution control
Edge
Low

High
The SEQUENCE function is started beginning with the start
address (SEQUENCE GO).
Edge
High

Low
Ends sequence execution by jumping to the stop address
LLO LOCAL
LOCKED Front panel control disabling
Low All front panel controls are functional.
High All front panel controls are disabled except for the mains
switch, and activation is not possible with the LOCAL key.
MIN MINMAX Storage of Min-Max values for U and I is controlled when
the MINMAX function is activated (MINMAX ON)(UI_ ON).
Low The Min-Max function is active.
Edge
Low

High
The Min-Max function is deactivated. Values in the
Min-Max memories remain unchanged.
High The Min-Max function is inactive.
Edge
High

Low
Values in the Min-Max memories are reset and replaced
with momentary output values.
The Min-Max function is activated.
AIX Analog Input Uext, Iext
Low Analog setpoints not switched through
High Analog setpoints switched through
AIU Analog Input Uext
Low Analog setpoint not switched through
High Analog setpoint switched through
AII Analog Input Iext
Low Analog setpoint not switched through
High Analog setpoint switched through