Siemens SIMATIC S5 Manual page 214

BEF:
The following commands are valid without a message number being specified:
KS = KS
KS = PA
KS = S1
KS = S2
KS = T1
KS = T2
KS = G1
KS = G2
IP244
C79000–B8576–C861–02
Specification of the command
Cold restart
Messages 0 to 15 and 30 to 42 are transferred. The module
recalculates all the control parameters.
The module identification and the software version are
re-evaluated.
Assign parameters
Messages 0 to 15 and 30 to 42 are transferred. The module
calculates the control parameters taking into account the
previous values.
This command can be executed for all PLCs in the start-up OBs
(OB 20, OB 21, OB 22) and for the S5-115U, S5-135U and
S5-155U also in the cyclic program.
The module identification and the software version are
re-evaluated.
Switch over setpoint to temperature setpoint
Switch over setpoint to lower setpoint
The controller is not disabled if the second tolerances are
violated.
The controller is disabled if the second tolerances are violated
Do not output the averaged manipulated variable.
If a thermocouple fails, a 0% manipulated variable is output
instead of an averaged manipulated variable.
Output the averaged manipulated variable
With the command "G2", you can decide whether a manipulated
variable averaged over a specified monitoring time should be
output if a thermocouple fails.
Function
5–9