PM866-2 3BSE050201R1

PM864AK01

PM825 3BSE010796R1

PM510V16 3BSE008358R1

PM891是一種高性能控制器，能夠處理應(yīng)用程序

要求很高。

PM891通過光學(xué)模塊連接到S800 I/O系統(tǒng)。它可以行動

作為獨立的過程控制器，或作為執(zhí)行本地控制任務(wù)的控制器

在控制網(wǎng)絡(luò)中。

兩個PM891控制器可以作為一對冗余控制器一起工作，其中一個為PM891

用作主控制器，而另一個用作備用控制器。備份

如果在

主控制器。

通過兩個內(nèi)置IEEE802.3以太網(wǎng)實現(xiàn)控制網(wǎng)絡(luò)連接

PM891上的通道。

PM891還提供通信擴展總線（CEX總線）

可以連接多個擴展模塊。這些模塊提供連接

適用于各種現(xiàn)場總線和I/O系統(tǒng)。在冗余對的情況下，兩者

PM891連接到同一CEX總線，其中一個可以控制

模塊。

物理上，PM891處理器單元包括：

?電源和狀態(tài)信號連接器（L+、L-、SA、SB）。

?用于電氣CEX總線的DB25連接器。

?外部電池連接器。

?用于兩個以太網(wǎng)通道的RJ45連接器。

?一個通信端口。

?用于連接最多七個集群的Optical Modulebus連接器，

具有12個非冗余或6個冗余模塊（即7x12=84個模塊）。

?冗余鏈路連接器。

?SD（安全數(shù)字）存儲接口。

?LED。

?按鈕復(fù)位開關(guān)

處理器單元冗余可用于PM861、PM864、PM865、PM866和

PM891。在這種情況下，控制器包含兩個處理器單元，每個處理器單元包括

用于系統(tǒng)和應(yīng)用軟件的存儲器。一個單元作為主要單元

另一種是備份（熱備用）。主處理器單元控制該過程。這個

備用設(shè)備隨時待命，準(zhǔn)備在主設(shè)備出現(xiàn)故障時接管。這個

切換在不到10ms的時間內(nèi)順利完成。在切換過程中

過程輸出被凍結(jié)。

轉(zhuǎn)換后，系統(tǒng)作為一個沒有冗余的系統(tǒng)運行

只有一個處理器單元在工作。您可以更換出現(xiàn)故障的處理器

單元，而系統(tǒng)正在運行。更換后，系統(tǒng)

再次具有冗余處理器單元。

如果備份單元出現(xiàn)錯誤，您也可以在

系統(tǒng)正在運行。

備份單元中發(fā)生的錯誤永遠不會影響主單元的運行。

主單元和備份單元在邏輯上彼此分離。

主處理器單元中的硬件錯誤導(dǎo)致系統(tǒng)執(zhí)行正確的

轉(zhuǎn)換。這些硬件錯誤是單個錯誤。

應(yīng)用程序編程和通信完全不受

冗余

PM891 is a high performance controller, which is capable of handling applications

with high requirements.

PM891 connects to the S800 I/O system through the optical Modulebus. It can act

as a stand-alone Process Controller, or as a controller performing local control tasks

in a control network.

Two PM891 controllers can function together as a redundant pair, with one PM891

acting as the primary controller and the other acting as the backup. The backup

controller takes over the process controller tasks if any hardware error occurs in the

primary controller.

The control network connectivity is obtained by two built in IEEE802.3 Ethernet

channels on PM891.

PM891 also provides a communication expansion bus (CEX-Bus) to which a

number of expansion modules can be connected. These modules offers connectivity

to a wide range of field bus and I/O systems. In case of a redundant pair, both

PM891s are connected to the same CEX-Bus and one of them can control the

modules.

Physically, the PM891 Processor Unit consists of:

? Connector for power supply and status signals (L+, L-, SA, SB).

? DB25 connector for Electrical CEX-Bus.

? External battery connector.

? RJ45 connectors for the two Ethernet channels.

? One Com port.

? Optical Modulebus connector for connection to a maximum of seven clusters,

with 12 non-redundant or six redundant modules (that is, 7x12 = 84 modules).

? Connectors for Redundancy Link.

? SD (Secure Digital) memory connector.

? LEDs.

? Pushbutton reset switch

Processor unit redundancy is available for PM861, PM864, PM865, PM866, and

PM891. In this case, the controller contains two processor units, each including

memory for system and application software. One unit is acting as primary, the

other is backup (hot stand-by). The primary processor unit controls the process. The

backup stands by, ready to take over in case of a fault in the primary. The

changeover is done bumplessly and in less than 10 ms. During the changeover, the

process outputs are frozen.

Following a changeover, the system operates as a system without redundancy with

only one processor unit in operation. You can replace the malfunctioning processor

unit while the system is running. After the replacement is carried out, the system

once again has a redundant processor unit.

If an error arises in the backup unit, you can also replace the backup unit while the

system is running.

Errors which occur in the backup unit can never affect the primary unit's operation.

The primary unit and the backup unit are logically separated from one another.

Hardware errors in the primary processor unit cause the system to perform a correct

changeover. These hardware errors are single errors.

The application programming and the communication are totally unaffected by the

redundancy.