Siemens Simatic S7-1500 CPU 1512C-1 PN User Manual

Interrupts/diagnostics alarms
6.2 Interrupts and diagnostics
CPU 1512C-1 PN (6ES7512-1CK01-0AB0)
138 Manual, 12/2017, A5E40898741-AA
6.2.3
Interrupts and diagnostics of the digital on-board I/O
Diagnostics interrupt
A diagnostics alarm is output for each diagnostics event and the ERROR LED flashes on the
digital on-board I/O. You can read out the diagnostics alarms, for example, in the diagnostics
buffer of the CPU. You can evaluate the error codes with the user program.
Table 6- 12 Diagnostics alarms, their meaning and corrective measures
Diagnostics alarm
Error code
Meaning
Corrective measures
Load voltage missing
11
H
No supply voltage L+
Feed supply voltage L+
Hardware interrupt
lost
16
H
The digital on-board I/O cannot trigger an
interrupt because the previous interrupt
was not acknowledged; possibly a con-
figuration error
• Change the interrupt processing in the
CPU and reconfigure the digital on-
board I/O.
Diagnostic interrupts when using high-speed counters
Table 6- 13 Diagnostics alarms, their meaning and corrective measures
Diagnostics alarm
Error code
Meaning
Corrective measures
Illegal A/B signal
ratio
500
H
• Time sequence of the A and B signals
of the incremental encoder do not
meet certain requirements.
• Possible causes:
– Signal frequency too high
– Encoder is defective
– Process wiring is incorrect
• Correct the process wiring
• Check the encoder/sensor
• Check the parameter assignment.

Siemens Simatic S7-1500 CPU 1512C-1 PN Specifications

General

Integrated Interfaces	PROFINET
Data Memory	1 MB
Number of Signal Boards	1
Firmware Version	V2.8
Rated Value (DC)	24 V
Number of PROFINET Ports	2
Number of PROFINET Ports with Switch	2
Integrated Web Server	Yes
Number of Digital Inputs	16
Number of Digital Outputs	16
Number of Analog Outputs	2
Number of High-speed Counters	6
Program Memory	300 KB
Number of Signal Modules	32
Engineering with	STEP 7 Professional V13
Interface Type	Ethernet
Data Storage	Yes
Operating Temperature	0 to 60 °C
Dimensions	147 mm x 129 mm