Hi,
we are using 1756-L61 PLC redundant system in one location . due to some minor faults , we upgrade the firmware from 19.52 to 20.58. after upgrade, the system work only locally thorough local HMI. if we want to change the system to be operate remotely thorough SCADA, all data will froze.
please advise.
we are using 1756-L61 PLC redundant system in one location . due to some minor faults , we upgrade the firmware from 19.52 to 20.58. after upgrade, the system work only locally thorough local HMI. if we want to change the system to be operate remotely thorough SCADA, all data will froze.
please advise.