Description
Description: The Field Control Processor 270 (FCP270) is a distributed, optional fault-tolerant, on-site installed controller module. FCP270 performs regulation, logic, timing, and sequential control together with the connected fieldbus module. It also performs data collection, as well as alert detection and notification. FCP270 is connected to the MESH control | network through standard fiber optic 100 Mbps Ethernet. Compared to other process controllers, the unique and patented fault-tolerant operation of FCP270 greatly improves reliability. The fault-tolerant version of FCP270 consists of two modules running in parallel, with two Ethernet connections to the MESH control network. Two FCP270 modules are combined as a pair of fault-tolerant modules, allowing for almost any occurrence within a pair of modules
Provide continuous operation of the controller in case of hardware failure. Both modules receive and process information simultaneously, and the module itself detects faults. One of the important methods for fault detection is to compare communication messages at external interfaces of modules. The message will only leave the controller when both controllers agree to send it (bit by bit matching). After detecting a fault, both modules will run self diagnosis to determine which module has a defect. Then, the flawless module will take over control without affecting the normal systemUnified operation
FCP270 Control Processor, P/N – P0917YZ
FBM240 provides 8 voltage monitor discrete input channels and 8 discrete output channels with read back function. Each channel is isolated separately, and the integration of each other Foxboro ™ The output channel of the DCS fieldbus module (FBM) provides a demand state read back signal for signal status (ON or OFF), which drives the output solid-state switch. The output demand state reading back signal is compared to the expected output drive state. If there is a mismatch, the channel is marked as “BAD”. FBM provides both single and redundant operation modes. When redundant, a pair of FBM240 has a redundant adapter to a universal terminal component (TA). The 8-channel relay output supporting TA is designed to use 8 input channels as output relay contact monitors to read back signals. When the input is used as a read back signal for the contact state, it can be used to determine whether the relay output contact has obtained the correct control strategy state. Eight input channels can be configured on the basis of each channel to compare errors between the expected output state and the read back value of the input channel. When using relay output TA, customers cannot use 8 input field wiring 8 discrete outputs/8 discrete voltage monitor inputs • 8 discrete inputs read the voltage on the relay contacts. Set if the contact status matches the corresponding output channel • Monitor each FBM output, if the output is in the wrong state • Single or redundant module •
The output internal read back FBM240 has 8 internal read back channels, one for each output channel, used to verify whether the output has changed to the requested state. These channels read the voltage across the relay contacts on the relay terminal assembly. The status of these channels is displayed on the LED on the front panel of FBM240. When is external power applied to the relay contacts of each channel? When the relay contacts close, the channel opens, and when the relay contacts close, the channel closes and opens. If the contact state does not match the corresponding output state, the channel is marked as BAD. The FBM also monitors each of its eight outputs and sets the corresponding output. If the output is in an error state, the channel BAD is activated. If the channel or input power is marked as BAD, the CP displays to the Foxboro DCS as a system management alarm and control block panic relay termination component (TA) that can support the following discrete outputs based on the channel. Each discrete output is galvanically isolated from other channels and ground. When used with RH916AQ/RH916AR termination components, each I/O channel is isolated from all other channels, grounding, and output current fuses to help protect them from overload. The configuration options allow the input to be used independently of the output of the terminating component. The eight voltage monitor inputs and switch outputs operate at 15 to 60 volts DC voltage. Figure 2- FBM240 with relay output TA, displaying internal read back and output contact status read back redundant contact output function block COUTR for output. The output write and initialization logic redundant channels processed by the COUTR block. At each write of the COUTR block, the same output write is sent to two modules, making full use of the fieldbus and the logic circuit units of each module. You can choose to continuously output after the block input or pulse output with selectable pulse width. When a fault is detected in one of the modules, its output is marked as BAD, and the corresponding channel in the module automatically continues to drive the discrete output. Each output channel drives an external power supply load. Each FBM240 power module is equipped with a diode OR in the redundant adapter to help ensure redundant power. The microprocessor of each module executes digital output application programs and verifies diagnostic routines for FBM health. Configurable options for fault protection output safety include: • Digital output fault protection fallback data – specify channel fallback values (0 or 1) for each of the eight digital outputs • Mask options – determine which of the eight digital outputs maintains its current value and which outputs use fallback values • Fieldbus fault protection delay time – FBM wait for communication length from CP before entering a communication fault
For redundant modules, the fail safe backup data and mask options are configurable. An additional option is provided so that module data will fall back to zero (0) when the module is offline due to maintenance functions, thus not interfering with the remaining modules that are still online. FBM240 requires firmware version 1.40N or higher to support this feature. For a single module, the fail safe fallback data and mask options are configurable. The standard design of this module features a sturdy extruded aluminum casing that can be applied to circuits. The housing designed specifically for installing FBM provides various levels of G3 harsh environments that comply with ISA standard S71.04. The redundancy of high availability module pairs, coupled with high fault coverage, provides a very high subsystem availability time. This module performs the signal conversion required for interface electrical input signals from field sensors to optional redundant field buses. It executes discrete I/O programs with configurable options such as input filtering time, fault protection configuration, and continuous or instantaneous output. If the instantaneous output is configured, the pulse output interval is also configurable. In case of redundancy, any module can be replaced without disturbing the field input, or signals can be output to good modules. There is no need to remove on-site equipment termination cables, power or communication cables. The redundant 2Mbps module fieldbus interface used by the fieldbus communication module (FCM) or field control processor (FCP) FBM. FBM240 accepts communication from any path on a redundant 2Mbps fieldbus. If any path is unsuccessful or switches at the system level, the module continues to communicate through the active path. Easy to disassemble/replace modules installed on the 200 series backplane. The two screws on the FBM help secure the module to the substrate. The redundant module must be located on the first module adjacent to the odd numbered position on the substrate (e.g. marked positions “3” and “4”).
To achieve redundancy, cable connectors are terminated on two adjacent substrates, forming a single cable (see Figure 1, page 4). Single terminated cables from redundant adapters to related termination components (TA). In case of redundancy, any module can be replaced to a good module without disturbing the field input signal. Each module can remove/replace terminal wiring, power supply, or communication wiring without removing fields. Modular substrate installation FBM240 modules can accommodate up to four or eight FBMs when installed on modular substrates mounted on DIN rails. The modular substrate is installed on DIN rails or racks, including signal connectors for redundant modules, fieldbus, redundant independent DC power supplies, and terminal cables. Redundant modules must be located on the substrate (positions 1 and 2, 3 and 4, 5 and 6, or 7 and 8). To achieve redundancy, a redundant adapter module is placed on two adjacent backplanes to provide a single terminated cable connector (see Figure 1). For system configurator applications and other systems monitored through SMON, Foxboro DCS system manager and SMDH, redundant FBM240s appear to be independent non redundant modules. The functional redundancy of these modules is provided by their associated control blocks. The redundant modules in Foxboro DCS HMI are two independent module management software applications for the system, such as Foxboro DCS System Manager and System Manager/Display Processing Program (SMDH). These functional redundancy modules are provided by their associated control blocks. The on-site I/O signals of the terminal components are connected to the FBM subsystem components (TA) through DIN rail installation terminals. The TA used with FBM240 provides: • Output signal connection points • External power connection points • Each output 5 A unsealed relay or 10 A unsealed relay • 15-60 V DC switch and voltage monitor input relay TA has a high voltage input circuit for monitoring the contacts of each output relay.
The monitor circuit is a component installed on the TA on the daughter card. Each TA has two sub cards, each with four monitoring circuits. TA is: • 80 to 125 V DC at RH917YF-5 A or 80 to 120 V AC at 10 A • 80 to 120 V AC at RH917HU-5 A • RH926SZ-15 to 30 V DC at 5 ARH916AQ/RH916AR-15 to 60 V DC voltage monitor and 2 A switch. Note: When the FBM240 output is disconnected, the TA contact remains oriented as described in Tables 2 and 3. RH916AQ/RH916AR passive TA provides fused 2A output and independent input for 15-60 V dc. The redundant adapter connects the redundant FBM substrate connectors together. Redundant adapters provide a single terminal connection to a single TA. The terminal components installed on the DIN rail are connected to the redundant adapter through detachable terminal cables in the following way. This cable has multiple lengths, up to 30 meters (98 feet), allowing terminal components to be installed in the same enclosure or adjacent enclosures. The front of the visual indicator module integrates red and green light-emitting diodes (LEDs) to provide visual status indication of FBM functions, as well as individual output points. Inductive load TA output may require bridging protection diodes or metal oxide varistors (MOVs) to sense the load. I/O channel isolation: Each channel is galvanically isolated from all other channels and grounded (grounded). The TA/module can withstand a potential of 600 volts AC applied within one minute without damage between any channel and ground, or between a given channel and any other channel. When used with relay TA, the input and output channels are not isolated from each other, but are isolated as I/O pairs. The danger of electric shock, explosion, or arc flash does not mean that these channels are designed to be connected to these levels of voltage.
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