ABB AC500-S Safety User Manual page 302

Configuration and programming
AC500-S libraries > SafetyExt_AC500_V22.lib
Table 78: FB name: SF_MAX_POWER_DIP_SET
Name Data type
VAR_INPUT
EN BOOL
MAX_POWER_DIP WORD
_CNT
VAR_OUTPUT
DONE BOOL
ERR BOOL
Call in ST
SF_MAX_POWER_DIP_SET (EN := SF_MAX_POWER_DIP_SET_EN,
MAX_POWER_DIP_CNT := SF_MAX_POWER_DIP_SET_MAX_POWER_DIP_CNT,
DONE => SF_MAX_POWER_DIP_SET_DONE, ERR => SF_MAX_POWER_DIP_SET_ERR);
4.6.7.3 SF_WDOG_TIME_SET
Setting the maximum allowed cycle time of the safety CPU
The SF_WDOG_TIME_SET function block allows the user to monitor the cycle time. The func-
tion block must be called by the user during the first cycle. In order to update the outputs
ACT_TIME and MAX_TIME, it is necessary to call the function block in each cycle. If the func-
tion block is not available in the application, the safety CPU and the application program will
enter the SAFE STOP state after the first cycle. The watchdog time is monitored prior to the
output of the PROFIsafe telegrams.
If the cycle time is exceeded, an error message is an output and the safety CPU enters the
SAFE STOP state. Reasonable values are longer than the typical safety CPU runtime and at
least two times shorter than the F_WD_Time of the safety I/O module.
Only one function block instance must be used in the safety program, otherwise a warning is
issued.
302
Initial value Description, parameter values
FALSE The block is activated to store
MAX_POWER_DIP_CNT value in the flash memory
using a transition of EN input from FALSE to TRUE.
The block remains active and ignores any changes
on EN input until DONE output is equal to TRUE.
The MAX_POWER_DIP_CNT value can be stored in
the flash memory only if the transition on EN input
from FALSE to TRUE is triggered.
16#0000 Maximum number of the safety CPU warm starts
after power dip errors from power supply of non-
safety CPU. Warm start means that only one pow-
ering off/on cycle after power dip detection is needed
to restart the safety CPU.
FALSE Output DONE indicates that the set process is fin-
ished (see also ERR output).
FALSE If TRUE, then error occurred during the set process
(saving of MAX_POWER_DIP_CNT value to the
flash memory).
3ADR025091M0208, 12, en_US 2020/06/19