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This is the web edition of the original ⮫ AC500-S safety user manual, version 1.3.2. This web edition is provided for quick reference only. The original safety user manual must be used to meet functional safety application requirements. |
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1oo2 |
One-out-of-Two safety architecture, which means that it includes two channels connected in parallel, such that either channel can process the safety function. |
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AC500 |
ABB non-safety PLC |
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AC500-XC |
ABB non-safety PLC suitable for extreme environmental conditions |
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AC500-S |
ABB safety PLC for applications up to SIL 3 (IEC 61508), max. SIL 3 (IEC 62061) and PL e (ISO 13849-1) |
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AC500-S-XC |
ABB safety PLC for applications up to SIL 3 (IEC 61508), max. SIL 3 (IEC 62061) and PL e (ISO 13849-1) suitable for extreme environmental conditions |
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AC500-S Programming Tool |
IEC 61131-3 editor, included in engineering suite Automation Builder |
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ADC |
Analog to digital converter |
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AOPD |
Active opotoelectronic protective device |
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Automation Builder |
Integrated engineering suite for ABB PLCs, including the AC500-S Programming Tool |
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CCF |
Common cause failure |
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Control Builder Plus PS501 |
Integrated engineering suite for ABB PLCs, including the AC500-S Programming Tool, predecessor of Automation Builder |
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CPU |
Central processing unit |
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CRC |
Cyclic redundancy check. A number derived from and stored or transmitted with a block of data in order to detect data corruption. |
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DC |
Diagnostic coverage |
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DPRAM |
Dual-ported random access memory |
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DUT |
Data unit type |
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IEC |
International electro-technical commission standard |
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EDM |
External device monitoring signal, which reflects the state transition of an actuator |
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EMC |
Electromagnetic compatibility |
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EN |
European norm (european standard) |
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EPROM |
Erasable programmable read-only memory |
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Error severity |
Indicated by a number. The lower the number is, the more critical is the displayed error. E.g., "1" = the CPU does not start because the error does not allow a normal operation, "11" = different parameter settings |
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ESD |
Electro static discharge |
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ESPE |
Electro-sensitive protective equipment (for example a light curtain) |
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F-Host |
Data processing unit that is able to perform a special protocol and to service the "black channel" ⮫ [2] |
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F-Device |
Passive communication peer that is able to perform the special protocol, usually triggered by the F-Host for data exchange ⮫ [2] |
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F-Parameter |
Fail-safe parameter as defined in ⮫ [2] |
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FAQ |
Frequently asked questions |
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FB |
Function block |
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FBD |
Function block diagram (IEC 61131 programming language) |
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Flash memory |
Non-volatile computer storage chip that can be electrically erased and reprogrammed |
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FSCP |
Functional safety communication profile |
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FV |
Fail-safe value |
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GSDML |
Generic station description markup language |
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ID |
Identification |
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IO controller |
Controller that controls the automation task in PROFINET context |
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IO device |
Field device, monitored and controlled by an IO controller in PROFINET context |
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iParameter |
Individual safety device parameter |
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LAD |
Ladder logic diagram (IEC 61131 programming language) |
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Loop-back |
The programmable routing feature of a bus device re-routes unintentionally an F-Host message back to the F-Host, which expects a message of the same length (refer to ⮫ www.profisafe.net for further details). |
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LSB |
Least significant bit |
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Max. SIL |
Maximum safety integrity level (IEC 62061) |
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MSB |
Most significant bit |
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MTBF |
Mean time between failures |
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MTTF |
Mean time to failure |
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Muting |
Muting is the intended suppression of the safety function. This is required, e.g., when transporting the material into the danger zone. |
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NC |
Break contact. Normally-closed contacts disconnect the circuit when the relay is activated; the circuit is connected when the relay is inactive. |
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NO |
Make contact. Normally-open contacts connect the circuit when the relay is activated; the circuit is disconnected when the relay is inactive. |
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OEM |
Original equipment manufacturer |
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OSSD |
Output signal switching device |
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Passivation |
The passivation is the special state of safety I/O modules which leads to the delivery of safe substitute values, which are ‘0’ values in AC500-S, to the safety CPU. |
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PC |
Personal computer |
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PELV |
Protective extra low voltage |
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PES |
Programmable electronic system (refer to IEC 61508) |
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PFD |
Probability of failure on demand |
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PFH |
Probability of failure per hour |
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PL |
Performance level according to ISO 13849-1 |
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PLC |
Programmable logic controller |
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POU |
Program organization unit |
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Power cycle |
Power cycle means to power off the safety CPU, wait for at least 1.5 s and power on the safety CPU again. |
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PROFIsafe |
Safety-related bus profile of PROFIBUS DP/PA and PROFINET IO for communication between the safety program and the safety I/O in the safety system |
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PROFINET |
Industrial technical standard for data communication over Industrial Ethernet |
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Proof Test Interval |
The proof test is a periodic test performed to detect failures in a safety-related system so that, if necessary, the system can be restored as close as possible to its previous new state. The time period between these tests is the proof test interval. |
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PS |
Programming system |
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PTC |
Positive temperature coefficient |
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RAM |
Random access memory |
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Reintegration |
It is the process of switching from substitute values "0" to the process data. |
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RIOforFA |
Profile for remote I/O for factory automation. To get quality information of a channel synchronously via the diagnosis mechanism. ⮫ [13] |
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Safety variable |
It is a variable used to implement a safety function in a safety-related system |
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SCA |
Safety code analysis - ABB software tool to automatically check the safety programming rules |
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SD card |
Secure digital memory card |
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SELV |
Safety extra low voltage |
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SFRT |
Safety function response time |
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SIL |
Safety integrity level (IEC 61508) |
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ST |
Structured text (IEC 61131 programming language) |
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SVT |
Safety Verification Tool - ABB software tool to verify the AC500-S safety configuration in Automation Builder |
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TCI |
Tool Calling Interface ⮫ [14] |
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TÜV |
Technischer Überwachungs-Verein (technical inspection association) |
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TWCDT |
Total worst case delay time |
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ULP |
Unit in the last place, which is the spacing between floating-point numbers, i.e., the value the least significant bit represents if it is 1 (refer to ⮫ http://en.wikipedia.org/wiki/Unit_in_the_last_place for more details). |
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WLAN |
Wireless local area network |