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
88 Manual, 06/2017, A5E00105505-AJ
Tolerances of the programmable input delays
Table 3- 12 Tolerances of the input delays at SM 321; DI 16 x DC 24 V
Programmed input delay
Tolerance
0.1 ms
60 μs to 140 μs
0.5 ms 400 μs to 900 μs
3 ms (default)
2.6 ms to 3.3 ms
15 ms
12 ms to 15 ms
20 ms
17 ms to 23 ms
3.11.3 SM 321; DI 16 x DC 24 V - Diagnostics
Diagnostic messages of SM 321; DI 16 x DC 24 V
The table below shows an overview of the diagnostic messages of SM 321; DI 16 x DC 24 V.
Table 3- 13 Diagnostic messages of SM 321; DI 16 x DC 24 V
Diagnostic message
LED
Scope of diagnostics
programmable
Sensor supply missing
SF
Channel group
yes
Wire break
SF
Channel group
Module not programmed
SF
Channel group
External auxiliary voltage missing
SF
Module
no
Internal auxiliary voltage missing
SF
Module
Fuse blown
SF
Module
Incorrect module parameters
SF
Module
Watchdog time-out
SF
Module
EPROM fault
SF
Module
RAM fault
SF
Module
Hardware interrupt lost
SF
Module
Note
A prerequisite for detecting faults indicated by programmable diagnostic mes
sages is an
appropriate configuration of the digital module in STEP 7.

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)