Schmalz SXMPi, Руководство по эксплуатации

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Description of Functions
EN-US · 30.30.01.01721 · 01 · 09/19 33 / 66
7.5.2 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. This setting is particularly recommended for airtight workpieces.
In this mode, the control function is set to [
on
].
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.
7.5.3 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 for permissible leakage
-L-
.
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.
In this mode, the control function is set to [
on5
].
7.5.4 Control Shutoff [P-0: 0x004E]
This function deactivates the automatic control shutoff.
The function can be set using the parameter [
dC5
] in the configuration menu or via IO-Link.
If the [
NO
] setting is selected using the [
dC5
] parameter, the ejector will switch to "continuous suction"
mode in case of excessive leakage and a valve switching frequency >6/3 seconds.
If the [
ye5
] setting is selected using the [
dC5
] parameter, continuous suction will be deactivated and
the ejector will continue control, even in case of excessive leakage or if the valve switching frequency
reaches >6/3 seconds. Continuous suction will not be activated if the valve frequency is exceeded.
When the control shutoff is deactivated, the suction valve makes frequent adjustments. This
can destroy the ejector.
Depending on the ejector variant in question (NO/NC/IMP), the ejector will respond to undervoltage and
power failures by switching to “Continuous suction”, even when continuous suction has been deactivated
by the [
dC5
] = [
YE5
] setting.
7.6 Blow-Off modes [0x0045]
The following three blow-off modes are available. The function can be set with the parameter [
bLo
] in
the configuration menu or via IO-Link.
7.6.1 Externally controlled blow-off
The “blow-off” valve is controlled directly by the “blow off” command. The ejector switches to blow-off
mode for as long as the "Blow-off" signal is present. The "Blow-off" signal is given priority over the "Suc-
tion" signal.
In this mode, the blow-off function is set to [
-E-
].
7.6.2 Internally Time-Controlled Blow-Off
In this mode, the blow-off function is set to [
1-t
].
The “Blow-off” valve is automatically activated for the time period set as soon as the ejector leaves the
“Suction” mode. The blow-off time can be set with the parameter [
tbL
] in the main menu. The parame-
ter [
TBL
] is suppressed in the main menu if the operating mode [
-E-
] is active.
The "Blow-off" signal overrides the "Suction" signal, even if the specified blow-off time is very long.