Siemens SIMATIC S5 Manual page 216

KS = LE
KS = SE
T-NR: D, KF = x
ANST: I, BI
NEUA: Q, BI
PAFE: Q, BI
IP244
C79000–B8576–C861–02
The actual values of channels 13 and 14 are only updated if
bit 12 (read channel 13) and bit 13 (read channel 14) are set to
"1" in data word DW 30 of data block DB-B. These values are only
updated if no hot channel control, no heating current monitoring
and no pure Pt 100 operation has been selected. With the special
function, the bits are irrelevant.
Read the controller-specific data
Parameter T-NR: KF +0 to +12
All the data of a controller (two messages) are read from the
module.
Start/stop self-tuning function
Parameter T-NR:KF + 0 to + 12
In cyclic operation the self-tuning function can be started or
aborted.
Before executing the command the byte "Self-tuning parameter"
(DL n + 11) must be preassigned accordingly in the controller
message.
Specification of the message number
The message number depends on the command specified for
parameter BEF:
BEF: AS T-NR:
BEF: AE T-NR:
BEF: LE T-NR:
BEF: AB T-NR:
BEF: HB T-NR:
BEF: SE T-NR:
BEF: IW T-NR:
If the parameter ANST is set to "1", the execution of the command
is triggered if direct parameter assignment has been selected.
The parameter is reset by the function block with direct parameter
assignment once the command has been executed or if a
parameter assignment error occurs.
If parameters are assigned indirectly, the parameter ANST is
irrelevant.
Cold restart request from the module
After switching on the power supply, the module signals that it
requires parameters. The parameter NEUA then has
signal state "1". If the module is assigned parameters with the
command KS (cold restart) or PA (parameter assignment), the
module resets the "cold restart request" bit and the parameter
NEUA is also reset.
If a non-permissible parameter is assigned, the parameter PAFE
is set to "1". The error can then be found as an error number in
flag byte FY255.
Function
+ 0 to +15
+ 0 to +15
+ 0 to +12
+ 0 to +12
+ 0 to +12
+ 0 to +12
+17 to +21
5–11