Burkert Type 8620 - Manual (Page 82)

mxCONTROL Type 8620
Page 82
Configuration
Configuration
System Switch Access
via Cfg.-
menu Access
via XML-
Cfg.-File Abbre-
viation
(menu)) Value range Default values
(after factory reset or at
start of Cfg-File-
Download)
"System Switch" func-
tion Enable/Disable rw rw System
Switch
On/Off Off
Set point (*) Stand-By rw rw SP -99999 … 99999
(in the unit of
assigned input) 0.0
Delay time rw rw Delay 0 … 1800 s 1.0 s
Input r rw Input DigIn 1, DigIn 2,
DigIn 3, DigIn 4,
No Input No Input
(*) will be only displayed if a 4-20mA or frequency input is selected as „System switch“ input
14.1.4 Flow Switch override function (Specialist level)
The "Flow Switch Override" function (function to override the original output value) is used to set the
module outputs to "0"
if the input used as Flow Switch detects "No Flow".
Furthermore the common alarm will be actuated if “No Flow” is detected.
This function is active in automatic and manual mode.
To prevent an excessive switching frequency a delay time can be parameterized.
The "Flow Switch Override" function can be activated separately for each Function in which a control
module is configured.
If the "Flow Switch Override" function is enabled for a Function with a module, the corresponding
module outputs will be overridden with "0" as long as the "Flow Switch" is active.
The modules MONITOR_PV and CORROSION_DISPLAY do not support this function.
Input to work as Flow Switch: - binary input or
- potentialfree binary input or
- 4…20mA input or
- frequency input
Proper function of the Flow Switch override: - assignment of an according input
- setting the Flow Switch enabled
Binary input as "Flow Switch"
logical value input voltage
Input signal:
Not inverted (Inv = No) Input signal:
Inverted (Inv = Yes)
0 … 4.5 V (*) 0 / Ok 1 / No Flow
13 … 35 V (*) 1 / No Flow 0 / Ok
The configuration of the assigned binary input applies also to the Flow Switch.
Consequently the inversion of the assigned binary input applies also to the Flow Switch.
If the "Flow Switch Override" function is active, the respective manual control output will
be reset to "0"!