IC698CMX016 VMIVME-5567-000 350-005567-000 RX7i PACSystems Memory Module


The GE Fanuc Automation IC698CMX016 reflective memory module has a worst-case access time of 400 ns and a worst-case access time of 200 ns.

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he IC698CMX016 is a Control Memory Xchange module from the GE Fanuc RX7i Series. IC698CMX016 is a communication module used for the PACSystems RX7i programmable controllers. The PACSystems RX7i Controller functions to port applications from one hardware environment to another. The communication modules that are easily installed in these modules accessorise the distribution of input-output and control. An array of configurations and protocols are supported by these communication modules. One such module is the IC698CMX016 that is a Control Memory Xchange Module.

The IC698CMX016 facilitates the transfer of information between devices and PLCs. This transmission is carried out on a network of 2.12 gigabaud fibre optic wires. This network can host 256 nodes that are all congruous with 5565 devices. The network uses a reflective memory technology. These nodes are connected to one another forming a daisy loop pattern so that the receiver of each node is connected to the transmitter. This connectivity ensures that any change in status communicated to one node is relayed without delay to all the other nodes.

This control memory Xchange module has an effective data rate of 2.12 gigabaud in addition to 16 megabytes of reflective memory to store and process data. The IC698CMX016 has data a transfer rate that varies from 6.2 megabytes per second to 3.2 megabytes per second, depending on the density of redundant information. The module’s access time varies between 400 nanoseconds and 200 nanoseconds. The IC698CMX016 is installed using a 62.5-micron core LC type connector. The IC698CMX016 hosts 5-volt buses that require a minimum current of 1.2 amperes to function.

Analysis and Diagnosis of DCS Distributed Control System Faults
(1) Is the malfunction caused by improper use. Common faults of this type include power supply errors, terminal wiring errors, module installation errors, on-site operation errors, etc.
(2) Is the fault caused by DCS system operation error. Common faults of this type include parameter setting errors, incorrect setting of certain states, etc.
(3) Confirm whether it is an on-site instrument equipment fault or a DCS system fault. If there is an instrument malfunction on site, repair the corresponding on-site instrument.
(4) If the DCS system itself malfunctions, it should be confirmed whether it is a hardware or software fault.
(5) If there is a hardware malfunction, identify the corresponding hardware part and replace the module. This step should fully utilize the self diagnosis function of the DCS system to quickly locate the fault point. If there are no spare parts for the module, and the damaged module is only a single point of damage, it can be replaced with other good modules that do not use this circuit to temporarily solve the urgent need for production. After the spare parts are available, they can be replaced in a timely manner.
(6) If there is a software fault, it should also be confirmed whether it is a system software or application software fault.
(7) If the system software fails, you can restart to see if it can be restored, or reload the system software to restart. The point to be made here is that the daily management of the DCS system computer is also very important. Firstly, it is necessary to ensure the normal temperature, humidity, and cleanliness of the computer environment. According to the specific production situation, it is necessary to regularly clean the inside of the computer box to ensure good heat dissipation. In addition, corresponding measures should be taken to ensure that non thermal technical personnel cannot open the computer at will, so as to avoid installing programs, games, etc. unrelated to the DCS system, Infecting the system with computer viruses can cause serious consequences.
(8) If the application software malfunctions, all data in the user written program and configuration can be checked to identify the cause of the malfunction.
(9) By utilizing the self diagnostic testing function of the DCS system, each part of the DCS system is generally designed with corresponding self diagnostic functions. When a system malfunction occurs, it is necessary to fully utilize this function to analyze and determine the location and cause of the malfunction.

Daily maintenance of DCS distributed control system
(1) For process control stations, a system should be established for daily inspection. Check whether the fans inside the cabinet are operating normally, whether the uninterruptible power supply is operating normally, whether the redundant CP U master and slave relationships and function lights are displayed correctly, and whether communication is normal. Especially in summer, it is necessary to ensure the good operation of air conditioning, pay attention to observing and controlling the indoor temperature during the process, and the number of air conditioners should not be less than 2.
(2) According to the specific production situation, UPS regularly conducts power inverter tests and observes the output of the battery; The battery should be replaced regularly, and its cycle depends on the specific usage and environmental factors of the battery. It should generally be replaced every 3-5 years.
(3) The power supply automatic switching device for the DCS system should undergo regular automatic switching tests.
(4) Dust accumulation inside the process control cabinet should be cleaned in a timely manner with a vacuum cleaner to ensure good heat dissipation of modules, CPUs, and other equipment.
(5) The analog input and output must be replaced with safety tubes that meet the requirements and cannot be replaced with larger ones.
(6) When replacing the transmitter or repairing other thermal instruments on site, it is necessary to disconnect the fuse at that point in the process control cabinet before conducting on-site maintenance.
(7) When downloading programs from the upper computer to the lower computer, it should be carried out with the consent of the shift supervisor and the on duty shift supervisor depending on the specific production situation, and various protections should be removed.
(8) Once the mains power used in the DCS system is powered off and replaced by an uninterruptible power supply inverter, the operators and thermal personnel shall promptly notify the shift supervisor or electrical operators to immediately restore the mains power. If it cannot be restored in a timely manner, the thermal personnel can take appropriate measures to reduce the number of electrical equipment to extend the inverter power supply time and buy time for the restoration of mains power.