User Manual
Appendix A
GFK-2843A
Jan 2020
VersaSafe system
80
A-4
IC220SDL963 system handling in various
control systems
The functions of a VersaSafe island are mapped to the relevant control systems using
handling functional blocks.
The handling functional blocks for the relevant controller types, including the
documentation, can be found at
https://www.emerson.com/Industrial-Automation-
A-5
Enable principle
The enable principle is implemented in the VersaSafe system. For this, all modules with
local outputs have an enable function integrated in the device firmware (ANDed bit-by-bit)
for each local safe output channel. The enable function can be parameterized (enabled/
disabled) for each specific channel.
When the enable function is enabled, the relevant safe local output is ANDed bit-by-bit
with the corresponding standard output of the standard control system. This output is
then only set if the result of the safety function calculation permits this and the standard
control system has set the corresponding output.
The enable function is performed according to the single-channel or two-channel
parameterization of the safe outputs.
Important
The enable function is not graphically represented in VersaConf Safety in the safety logic
editor. Parameterize the enable function when parameterizing the channels.
Important
Disabling of the safety function
When validating the overall safety function, make sure that the safety function is not
disabled by the safety-related components or by the standard components.
