Siemens SIMATIC User Manual

Digital modules
3.11 Digital input module SM 321; DI 16 x 24 VDC; with hardware and diagnostic interrupts (6ES7321-7BH01-0AB0)
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
91
3.11.5 SM 321; DI 16 x DC 24 V - Interrupts
Introduction
This chapter describes the interrupt reaction of SM 321; DI 16 x DC 24 V. Always distinguish
between the following interrupts:
● Diagnostic interrupt
● Hardware interrupt
For detailed information on the OBs and SFCs mentioned below, refer to the STEP 7 Online
Help.
Enabling interrupts
There is no default interrupt setting, i.e. interrupts are disabled if parameters are not set
accordingly. You can enable interrupts in STEP 7 (see the chapter Parameters of
SM 321; DI 16 x DC 24 V (Page 86)).

Siemens SIMATIC Specifications

General

Product type designation	SIMATIC
CPU	Varies by model
Memory	Varies by model
Input/Output	Varies by model
Communication	Varies by model
Programming Language	STEP 7
Operating Temperature	0°C to 60°C (varies by model)
Protection Class	IP20
Category	Programmable Logic Controller (PLC)