Pilz PSS SB NOT, Basic license - Manual (Page 108)

9-4
Appendix
Modular Block System: Emergency Stop Circuits
SB062: Emergency stop monitoring
Version Date CRC
1.0 21.09.99 7F64
1.1 29.09.99 ADE9
1.2 31.05.00 9FFC
1.3 06.10.00 594B
1.4 09.07.03 228B
Changes from Version 1.0 to Version 1.1:
• Output of error messages (error bits) improved
• Error regarding the monitoring of contact synchronisation time rectified
Changes from Version 1.1 to Version 1.2:
• A reset button operated on PSS power up is now recognised as a
constant reset
• Block run time optimised when the E-STOP button is operated
Changes from Version 1.2 to Version 1.3:
• In Version 1.2, the enable paramter ENBL was set to 1 for one cycle
after the following sequence: “Press E-STOP - Release E-STOP - Press
E-STOP - Press RESET”. This error has now been rectified.
Changes from Version 1.3 to Version 1.4
• When the I/O group is started there is no need to acknowledge twice, if
there was an error before the stop of the I/O group.
• The following error was rectified: If the E-STOP button is operated in a
“E-STOP button released and error bit set 01” state (Acknowledge
required), and the error bit 00 was set, the error bit 01 was not reset in
certain situations. This led to acknowledge problems.
• The following faults have been rectified: When a synchronisation error
occurs, and the function test is performed within a PSS cycle, the
release is set to ENBL. There is not need to operate the RESET.