S5-95U, Second Serial Interface Description of the System
1.2 Range of Functions of the Two Serial Interfaces
You can connect programmers and operator panels at both serial interfaces.
The entire range of functions of the interfaces is listed in Table 1-3. The program execution period
may be extended when connecting a programmer, operator panel or SINEC L1 to the SI1 or SI2
interface (for scan on-load times of the PLC, see Appendix E).
Note
If a function is not parameterized in DB1, the driver number ”00
H
” is automatically
written in the system data during startup of the PLC ( Appendix B, system data word
46); i.e. you can operate a programmer or operator panel at the SI2 interface
immediately after the restart of the PLC.
Table 1-3 Overview of the Functions Possible at SI1 and SI2 interfaces
Input block INPUT X X
Output block OUTPUT X X
Test TEST
Program test PROG TEST - -
END program test END TEST - -
Signal status display STATUS X -
PLC functions PC FCT
PLC restart START X X
PLC STOP STOP X X
Compress COMPRESS X X
STATUS variable STAT VAR X X
Force FORCE - -
Force variable FORCE VAR X X
Possible at SI1 Possible at SI2Programmer Function
Designation Abbreviation
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PLC information PC INFO
Output addresses OUTP ADDR X X
Memory configuration MEM CONF X -
System parameter SYSPAR X X
Block stack BSTACK X -
Interrupt stack ISTACK X X
EWA 4NEB 812 6095-02
1-5
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