Digital Modules
3-12
Programmable Logic Controllers S7-300 Module Data
A5E00105505-03
Parameters of the digital modules
The settable parameters are listed in the special section on the module.
3.4 Diagnostics of the Digital Modules
Introduction
The information contained in this section refers only to the digital modules with
diagnostics capability. For the S7-300, these modules are as follows:
• Digital input module SM 321; DI 16 x DC 24 V with hardware and diagnostic
interrupts, clocked; (6ES7321-7BH01-0AB0)
• Digital Output Module SM 322; DO 16 x 24/48 VUC
(6ES7322-5GH00-0AB0)
• Digital Output Module SM 322; DO 8 x DC 24 V/0.5 A with diagnostic interrupt
(6ES7322-8BF00-0AB0)
• Digital output module SM 322; DO 8 x 120/230 VAC /2A ISOL
(6ES7322-5FF00-0AB0)
• Relay output module SM 322; DO 8 x Rel. 230 VAC /5A
(6ES7322-5HF00-0AB0)
Programmable and non-programmable diagnostic messages
In diagnostics, we make a distinction between programmable and
non-programmable diagnostic messages.
You obtain programmable diagnostic messages only if you have enabled
diagnostics by parameter assignment. You perform parameter assignment in the
“Diagnostics” parameter field in STEP 7.
Non-programmable diagnostic messages are always made available by the digital
module irrespective of diagnostics being enabled.
Actions following diagnostic message in STEP 7
Each diagnostic message leads to the following actions:
• The diagnostic message is entered in the diagnosis of the digital module and
forwarded to the CPU.
• The SF LED on the digital module lights.
• If you have programmed “Enable Diagnostic Interrupt” in STEP 7, a diagnostic
interrupt is triggered and OB 82 is called.
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