8502-BI-DP bus interface DCS

Description

8502-BI-DP bus interface DCS

8502-BI-DP bus interface DCS

Addressing of I/O modules

Modules are addressed by the BIM or Controller in terms of their position, or slot, in the total chain of 64 modules not by individual module types. As a result, a module can be removed and replaced by another of its own type without the need to ‘tell’ the system of the change. During configuration, the node is told the characteristics of each necessary module position whether or not the module is present at the time. Consequently, if a module is removed for service replacement, the properties of the ‘slot’ are still retained.

Input fail values

In the event of failure of an input module, the reported value is forced to a predefined state – low, high or hold last value. This ensures that the host adopts a state consistent with safe operation of the plant.

Power-up/initialization state

When powering-up a node it is essential for plant safety that the state of each of the outputs is known. While the node is initializing, the I/O modules are held in the power-up state (see following pages). After node initialization and before establishing external communication, the outputs are set to predefined “initialization” states. This “safestate” can be defined by the user for each output channel.

Non-volatile configuration memory

The configuration information for all I/O modules in a node is stored in non-volatile memory (NVM). When a module is replaced, when the node is powered up or following a reset, the node will download the stored configuration information to the relevant I/O modules. Visual indicators LEDs are provided on each module to indicate Power, Fault and channel Status information. These are based on the NAMUR NE44 specification for LED indicators. The Power and Fault indicators are common to all I/O modules and their states are shown in the following tables.

When transferring data between different programs, it is necessary to choose a suitable communication interface, which introduces the software interface standard OPC (OLEforProcessControl1) technology in the industrial control industry. OPC technology attempts to solve the problem of data exchange between different programs and devices using standard methods. It adopts a server/client mode, and as long as a server with a unified OPC interface is provided, the server can be accessed according to a consistent OPC client interface to achieve data exchange.

Recommended model:
AIM0006
AIM0006 2RCA021397A0001L
AIM0016
AIN-220
AIN-300
AINT-02C
AINT-02C 64715810
AINT12C
AINT-12C
AINT-14C
AINT-24C
Aio204
AIO216
Aio288
AIO288/1
AIP121-S00
AIP512
AIP827-1
AIP830
AIP830-001
AI-VE4003S2B3-AI8CH4-20MA4WIRE
AIZ7127
AKD-B00306-NAAN-0000
AKD-B00306-NBAN-0000
AKD-B00307-NAAN-0000
AKD-B0066-NAAN-0000
AKD-B0066-NBAN-0000
AKD-B0066-NBSQ-0000
AKD-B02406-NAAN-0000
AKD-C01007-CBEC-E000
AKD-P000306-NAEC-0000
AKD-P00306-NAAN-0000
AKD-P00306-NACC-E000
AKD-P00306-NBAN-0000
AKD-P00307-NBCN-0000