Siemens LOGO! 8 User Manual

2 Solution
Frei verwendbar House Control with Master-Slave - LOGO! Set 9
Entry ID: 64143308, V2.2, 09/2018
12
© Siemens AG
2018 All rights reserved
2.3.3 Heating
Inputs and outputs
Table 2-8
No.
Hardware
LOGO! module
Program inputs/outputs
1.
PT100 temperature sensor
Master RTD A1
AI3
2.
PT1000 temperature sensor
Master RTD A2
AI4
3.
Heating room 1 on/off
Master DM8 Q1
Q14
4.
Heating room 2 on/off
Master DM8 Q2
Q13
Function description
With the LOGO! display and LOGO! TDE it is possible to set a setpoint value for
each room.
If the room temperature reaches the setpoint value, the heating is switched off.
If the room temperature falls 1° below the setpoint value, the heating is switched on
again.
Table 2-9
No.
Function
Function block
Block name in the
program
1.
Temperature-dependent on/off heating 1
Analog Comparator
heater 1
2.
Temperature-dependent on/off heating 2
Analog Comparator
heater 2
Note
In the LOGO! basic device (master), the standard setting for two analog inputs
are used so the RTD expansion module has the inputs AI3 and AI4.

Siemens LOGO! 8 Specifications

General

Brand	Siemens
Model	LOGO! 8
Category	Controller
Language	English