Operating Instructions MODULAR SAFETY CONTROL SYSTEM MSC
MSC FIELDBUS MODULES CE-...
6
(Translation of the original operating instructions) 2121341-06-11/20
All safety outputs are combined in up to 4 bytes, depending on the firmware version of the fieldbus module, see Table 3.
The dual-channel safety outputs are transmitted as a bit via the fieldbus.
Fieldbus module firmware version
Size of safety output structure
< 2.0
up to two bytes
≥ 2.0
4 bytes
Table 3: Safety output structure
FW ≥ 2.0
The base unit MSC-CB can process only 16 bits at the safety outputs, which is why only the first two
bytes of the safety output structure are used.
FW < 2.0
The base unit MSC-CB-S can process up to 32 bits at the safety outputs, but only the first 16 bits of
the safety output structure can be transferred due to the limitation of the fieldbus module.
Depending on the type of the respectively installed modules, the position of the safety outputs varies in the following se-
quence: MSC-CB/MSC-CB-S, FI8FO2, AC-FO2, AC-FO4, AZ-FO4, AZ-FO4O8, AH-FO4SO8, FI8FO4S. If several modules of the
same type are installed, the order corresponds to the node number.
A diagnostic element consists of an index of the I/O with a problem and a diagnostic code of the problem.
FW ≥ 2.0
The diagnostic area in the output structure comprises 64 bytes, and the first 23 diagnostic elements
are therefore sent via the fieldbus simultaneously.
FW < 2.0
The diagnostic area in the output structure comprises two bytes, which is why only one diagnostic
element can be sent. With several diagnostic elements, the relative values change every 500 ms.
FW < 2.0
Each information set:
Ì
Input status
Ì
Input diagnostic
Ì
Fieldbus input status
Ì
Probe State
Ì
Safety output status
Ì
Safety output diagnostic
can be activated/deactivated to control the information and therefore the number of bytes sent to
the fieldbus.
NOTICE
Ì
The input and output structures are represented from the viewpoint of the MSC system.
Ì
On fieldbuses in which the data frames are specified (e.g. PROFIBUS), the input bytes must pre-
cede the output bytes.
