Siemens SIMATIC S7-1200 - Page 630

Technology instructions
10.2 PID control
S7-1200 Programmable controller
630 System Manual, V4.2, 09/2016, A5E02486680-AK
Cascade parameters
The following parameters enable you to select controllers as masters or slaves and to
determine the number of slave controllers that receive their setpoint directly from the master
controller:
Setting
TO-DB parameter
Data
type
Value range
Description
This
controller
is a
master
"Config.Cascade.IsMaster" Bool Bool Shows if this controller is
a master in a cascade.
When you check this
checkbox, you perform
the following:
• Set the parameter
"Con-
fig.Cascade.IsMaster
" to TRUE, instead of
FALSE if unchecked
(=default).
• Set “Selection Output
(heating)” in “Input /
output parameters”
section to “Out-
putHeat” once (Con-
fig.Output.Heat.Selec
t = 0).
• Enable “Number of
Slaves” input field.
• Disable “Activate
output (cooling)”
checkbox in “Input /
output parameters”
section.
Note: Only available if
cooling output of this
controller is deactivated
(“Activate output (cool-
ing)” checkbox in “Input /
output parameters” sec-
tion deactivated (Con-
fig.ActivateCooling =
FALSE).