Siemens 7MC3052-1AB63, Руководство по эксплуатации, Страница: 13 / 64

7
Operating instructions
6.2 Switching threshold OUT 1
OUT1 changes its switching status when the configured upper and lower thresh-
olds [ d1.SP , d1.rP ] are exceeded. The source d1.S defines the signal at
the output Out1.
Two sources are available:
• Two-colour mode: [
d1 ] → [ d1.S ] = QUot.
• One-colour mode: [ d1 ] → [ d1.S ]= SpEc.
First set the upper temperature value of the switching point [ d1.SP ]. The
temperature can be defined in °C or °F according to the unit setting. Then set
the lower threshold [
d1.rP
]. When you adjust the upper threshold [
d1.SP
]
the lower threshold [
d1.rP
] will change accordingly. The span remains the
same. If [ d1.SP ]. is lowered to a value where the span cannot be maintained
(as [ d1.rP ] would then fall below its minimum value), the [ d1.rP ] is kept with
its minimum value.
If [
d1.SP ] subsequently increases again, [ d1.rP ] also immediately increas-
es. The minimum distance between [ d1.SP ] and [ d1.rP ] is 2 K.
6.3 Output signal
The following switching functions can be selected:
• Normally open contact: [
d1 ] → [ d1.Fn ]= no (normally open)
• Normally closed contact: [ d1 ] → [ d1.Fn ]= nc (normally closed)
6.4 Upper threshold delay
Once the sensor has detected a temperature which exceeds the switching threshold
[ d1.SP ] the time delay [ d1.dS ] starts running. When this delay period has
elapsed, the output OUT1 activates switching. This status is maintained until the low-
er threshold [ d1.rP ] is violated. If this occurs before the time delay has elapsed,
the delay will reset. This function can be used, for example, to suppress spurious
impulse signals at the output.
• Upper threshold delay: [
d1 ] → [ d1.dS ] = 0...10 sec.