Schmalz Compact Terminal SCTSi, Operating Instructions Manual

Page: 61 / 94

Component Functions
EN-US · 30.30.01.02237 · 00 · 04/20 61 / 94
Unit -
EEPROM Yes
The following control function operating modes can be chosen:
No Control (Continuous Suction), H1 in Hysteresis Mode
The ejector produces continuous suction with maximum power.
The switch point evaluation for H1 is operated in hysteresis mode (two-point mode).
The hysteresis mode is a threshold switch with hysteresis. When the measurement value increases, the
switching point will be active when the switch-on threshold H1 is reached and remains on until it falls be-
low the reset threshold H1 – h1. The following must always apply for switching thresholds and reset
thresholds: H1 > h1. The hysteresis is therefore defined by the difference |H1 – h1|.
No Control (Continuous Suction), H1 in Comparator Mode
The ejector produces continuous suction with maximum power.
The switch point evaluation for H1 is operated in comparator mode (window mode).
In comparator mode, the switching point is active when the measurement value is between the upper
window point H1 and the lower window point h1. Outside this window, the switching point is inactive. If
necessary, a common switching hysteresis Hyx can be set, which symmetrically applies to both window
points. For the parameters “Upper window point H1” and “Lower window point h1”, the following must
always apply: H1 > h1.
Control
The ejector switches off vacuum generation when the switching point H1 is reached and switches it back
on when the vacuum falls below the hysteresis point (H1-h1). The switch point evaluation for H1 follows
the control function.
To protect the ejector, valve switching frequency monitoring is activated in this operating mode.
If the readjustment is too fast, the control function is deactivated and the device switches to continuous
suction.
Control with Leak Monitoring
This operating mode is the same as the previous mode, with the addition that the leakage rate within the
system is measured and compared to the configurable limit value.
If the actual leakage rate exceeds the limit value more than twice in succession, the control function is
then deactivated and the ejector switches to continuous suction.
Control without Continuous Suction
This operating mode is the same as the “Control” operating mode but it does not switch to continuous
suction when the valve switching frequency is exceeded.
Control with Leakage Monitoring, without Continuous Suction
This operating mode is the same as the “Control function with leakage monitoring” operating mode, but
the device does not switch to continuous suction when the permitted leakage is exceeded or when the
valve switching frequency is exceeded.
6.4.3 Blow-Off Function (0x006E)
Offset parame-
ter 110 (0x006E)
Description Blow mode for ejectors
Index Index 0 to 15 corresponds to ejector #1 to #16
Data type uint8
Length 16 bytes