Element
Nesting depth
Monitoring
OBs
Program cycle
Startup
Time-delay interrupts
Cyclic interrupts
Hardware interrupts
Time error interrupts
Diagnostic error interrupts
Pull or plug of modules
Rack or station failure
Time of day
Status
Update
Profile
Timers
Type
Quantity
Storage
Counters
Type
Quantity
Storage
Table A- 91
Communication
Technical data
Number of ports
Type
HMI device
Programming device (PG)
Connections
Data rates
Isolation (external signal to PLC logic)
Cable type
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
Description
16 from the program cycle or startup OB
6 from any interrupt event OB
Status of 2 code blocks can be monitored simultaneously
Multiple
Multiple
4 (1 per event)
4 (1 per event)
50 (1 per event)
1
1
1
1
Multiple
1
1
1
IEC
Limited only by memory size
Structure in DB, 16 bytes per timer
IEC
Limited only by memory size
Structure in DB, size dependent upon count type
SInt, USInt: 3 bytes
•
Int, UInt: 6 bytes
•
DInt, UDInt: 12 bytes
•
Description
2
Ethernet
6 max.
1
8 for Open User Communication (active or passive): TSEND_C,
•
TRCV_C, TCON, TDISCON, TSEND, and TRCV
3 for server GET/PUT (CPU-to-CPU) S7 communication
•
8 for client GET/PUT (CPU-to-CPU) S7 communication
•
10/100 Mb/s
Transformer isolated, 1500 VAC, for short term event safety only
CAT5e shielded
Technical specifications
A.6 CPU 1217C
881