Going Online And Connecting To A Cpu - Siemens SIMATIC S7 System Manual
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Also See for SIMATIC S7:
- System manual (866 pages) ,
- Functional safety manual (212 pages) ,
- User manual (134 pages)
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Online and diagnostic tools
9.2 Going online and connecting to a CPU
The CPU also provides two LEDs that indicate the status of the PROFINET communications.
Open the bottom terminal block cover to view the PROFINET LEDs.
● Link (green) turns on to indicate a successful connection
● Rx/Tx (yellow) turns on to indicate transmission activity
The CPU and each digital signal module (SM) provide an I/O Channel LED for each of the
digital inputs and outputs. The I/O Channel (green) turns on or off to indicate the state of the
individual input or output.
In addition, each digital SM provides a DIAG LED that indicates the status of the module:
● Green indicates that the module is operational
● Red indicates that the module is defective or non-operational
Each analog SM provides an I/O Channel LED for each of the analog inputs and outputs.
● Green indicates that the channel has been configured and is active
● Red indicates an error condition of the individual analog input or output
In addition, each analog SM provides a DIAG LED that indicates the status of the module:
● Green indicates that the module is operational
● Red indicates that the module is defective or non-operational
The SM detects the presence or absence of power to the module (field-side power, if
required).
Description
Field-side power is off
Not configured or updated in progress
Module configured with no errors
Error condition
I/O error (with diagnostics enabled)
I/O error (with diagnostics disabled)
9.2
Going online and connecting to a CPU
An online connection between the programming device and a target system is required for
loading programs and project engineering data to the target system as well as for activities
such as the following:
Testing user programs
Displaying and changing the operating mode of the CPU
Displaying and setting the date and time of day of the
Displaying the module information
Comparing online and offline blocks
Diagnosing hardware
270
CPU
DIAG
(Red / Green)
Flashing red
Flashing green
On (green)
Flashing red
-
-
S7-1200 Programmable controller
System Manual, 11/2009, A5E02486680-02
I/O Channel
(Red / Green)
Flashing red
Off
On (green)
-
Flashing red
On (green)
- Quick Links:
- Introducing the S7-1200 Plc
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