Synchronicity - Siemens SIMATIC S7-300 Reference Manual
Programmable logic controllers module data
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Also See for SIMATIC S7-300:
- Manual (676 pages) ,
- Installation and operating manual (356 pages) ,
- Hardware and installation manual (256 pages)
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Analog Modules
Status, interrupts, diagnostics
Interrupts
•
Diagnostic interrupt
Diagnostic functions
•
Group error display
•
Diagnostic information
readable
Substitute value can be applied
Data for Selecting an Actuator
Output ranges (rated values)
•
Voltage
•
Current
Load resistance (in the nominal
range of the output)
•
For voltage outputs
–
capacitive load
•
For current outputs
–
Inductive load
4.27.1
Synchronicity
Characteristics
Reproducible (i.e. same length) reaction times are achieved with the SIMATIC with
an equidistant DP bus cycle and the synchronization of the following free running
single cycles:
• Free running of the user program. The length of the cycle time can vary due to
acyclic program branching.
• Free running, variable DP cycle at the PROFIBUS subnetwork
• Free running cycle at the DP-Slave back plane bus.
• Free running cycle during the signal conditioning and conversion in the
electronic modules of the DP-Slave.
In the case of equidistance the DP cycle runs in phase and with the same length.
In this cycle the processing levels of a CPU (OB 61 to OB 64) and the
synchronous peripheral are synchronized. The I/O data are therefore transferred at
defined and consistent time intervals (clock synchronicity).
Requirements
• The DP-Master and DP-Slave must support the synchronicity. They require
STEP 7 from Version 5.2.
4-172
Programmable
Programmable
Red LED (SF)
Possible
Yes, programmable
±10 V
0 to 10 V
1 to 5 V
±20 mA
0 to 20 mA
4 to 20 mA
min. 1 kΩ
max. 1 µF
max. 500 Ω
max. 1 mH
Voltage outputs
•
Short-circuit protection
•
Short-circuit current
Current outputs
•
No-load voltage
Destruction limit against
voltages/currents applied from
outside
•
Voltage at outputs to M
ANA
•
Current
Connection of actuators
•
For voltage output
–
Four-conductor
connection (measuring
circuit)
•
For current output
–
Two-conductor
connection
Programmable Logic Controllers S7-300 Module Data
Yes
max. 40 mA
max. 18 V
max. 15 V continuous
75 VDC for no more than
0.1 s
(pulse duty factor 1 : 20)
max. 50 mA DC
Possible
Possible
A5E00105505-03
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