Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 11 Logic functions 2017-09-29
• If a terminal is already used by another function (e.g. heating circuit \ flow
temperature, Comparator …), this will be inherited to the Logic input
• If the terminal is not used, it is defined as “°C“
• If an unused terminal should use an universal unit (e.g. ppm, Digital, %, W/m
2
…), it
must be configured to the function block „Extra configuration > Miscellaneous > Input
identifier > Display input 1…8”
In order to be able to set all configuration and setting options with different units, the
ACS790 has a "help menu" input identifier (Commissioning > Extra configuration >
Input identifier). This menu point is only available with ACS790. This means, this menu
point does not exist in the controller.
For example, in a Comparator is “%“ used as measurement. Therefore, it must be
ensured that the unit “%“ is defined in the help menu input identifier.
An example is described in chapter 11 Logic function in the section 11.1.1 Activate the
Logic (for the measurement "ppm").
11.2.2 Assign texts
You can assign a text to each Comparator. The text is displayed on the menu and in the
operating line.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Comparator > Comparator 1...2
Operating line
Range
Factory setting
Comparator 1…2
Max. 20 characters
Comparator 1…2
11.2.3 Upper and lower limit value
The Comparator switches on when Limit value on is exceeded, and off when the value
is below Limit value off.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Comparator > Comparator 1...2
Operating line
Range
Factory setting
Limit value on
Depending on selected type
Type-dependent
Limit value off
Depending on selected type
Type-dependent
11.2.4 Switch-on/switch-off delay
You can set a switch-on and switch-off delay for the Comparator output.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Comparator > Comparator 1...2
Operating line
Range
Factory setting
Switch-on delay
00.00...59.59 m.s
or
*
00.00...23.50 h.m
00.00 m.s
Switch-off delay
00.00...59.59 m.s or*
00.00...23.50 h.m
00.00 m.s
* See Notes on the time format in section 11.2.1
The "Switch-on delay" acts on the switch-on command, the "Switch-off delay" on the
switch-off command.
Important information
for
setting/operation with
ACS790
Setting values
Setting values
Setting values