JojoD
Member
Hi, I have encountered fault code 0021h on our existing controls (fault LED lights and the system stops); description in help file says "the remote power failure of an expansion rack has occured" but we're only using a single 7-slot rack. The plc communicates with micrologix 1200 via two links (1747-AIC and 1761-AIC) for interlock commands using messaging. Hope anyone can suggest how to solve/ remove the error. thanks.....