Support of Identity object's reset service (service code 0x05) shall be disabled for CIP Safety Applications

In case the host application is a CIP Safety application, the reset service of the identity object shall not be supported by the EtherNet/IP stack, i.e. shall be rejected with the error "service not supported" (general status code 0x08).

The Cip Safety Specification, Volume 5 Edition 2.17, states that the reset service of the Identity object is optional for CIP Safety devices. However, in order to simplify the interface of the EtherNet/IP stack to a CIP Safety host application we entirely switch off the reset service, which is also compliant to the specification.

Mode of operation:

The EtherNet/IP stack shall recognize autonomously, whether there is a CIP Safety Application running on top of it. This shall be achived by checking the availability of the Safety Network Nummber (SNN) of the TCP/IP Interface Object (attribute 7), which must be activated by the CIP Safety host application anyway. If the SN is available, the reset service will be "disabled".