How to install GE Series 90-70 Genius Bus Controller?

Receive global data: The bus controller can be configured to receive or ignore global data from any other bus controller, and the memory type and length of the incoming global data are also selected during configuration, as detailed in Chapter 3. Series 90-70 CPUs can place incoming global data in% I,% Q,% G,% R,% AI, or% AQ memory.

Operation and Diagnosis

1. Data transmission process

Bus scanning: The controller scans devices in a loop through token passing, receives input data, and broadcasts output; Synchronize data through onboard RAM during the CPU scanning cycle.

Communication Request (COMREQ): The operation is defined through a Command Block, supporting 16 types of commands (such as Pulse Test, Read/Write Configuration), and the Status Block returns the execution result (success/failure code).

2. Diagnostic function

Fault table: records circuit faults (such as disconnection, short circuit), module faults (such as memory errors), communication faults (such as full datagram queue), etc., which can be viewed or cleared through Logicmaster software.

Status reference: Provide system level fault signals (such as LOS_SOC, IOUFULL), support fault contact linkage control.

Advanced features

1. Distributed control and monitoring

Distributed control: Multiple CPUs control different devices by disabling outputs to avoid conflicts.

Data monitoring: Supports the Assigned Monitor mode, which specifies the device to receive additional fault reports through the Assign Monitor command.

2. Redundant system

Redundancy mode: Dual bus (same PLC or dual PLC), redundant controller (Hot Standby/Duplex mode), ensuring seamless switching in case of bus failure.

Configuration example: Provide configuration steps for 6 typical scenarios (such as single PLC dual bus, dual PLC redundant control).