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HARDWARE SPECIFICATIONS
The serial communication modules (ALR111 and ALR121) hardware specifications are as shown below.
Table Serial Communication Module Hardware Specifications
Item |
Specifications |
|
Model |
ALR111 |
ALR121 |
Interface |
RS-232C |
RS-422/RS-485 |
Connection method |
Point-to-point |
Point-to-point (RS-422) Multipoint (RS-485) |
Communication function |
Half-duplex |
|
Synchronization method |
Start-stop synchronization |
|
Transmission speed |
1200/2400/4800/9600/19200/38400 bps (*1) |
|
Transmission code |
ASCII/binary |
|
Character length |
7/8 bits |
|
Stop bit length |
1/2 bits |
|
Parity check |
None/even/odd |
|
Lag time after data transmission |
1 ms (The lag time to start receiving data again after data transmission.) |
|
Transmission distance |
Maximum 15 m |
Maximum 1200 m (total extended length) |
Installation method |
Mounted on ANB10£, ANB11£, ANR10£, AFF50£, AFV10£, AFV30£, or AFV40£ |
|
I/O wiring |
AKB131, AKB132, AKB133, AKB134 cables, etc. |
Cable with 3-pair shield, AKB161, or AKB162 |
Wiring connection |
D-sub-9-pin (female x 2) |
Clamped with terminal block’s M4 screws (5 poles x 2) |
Current consumption |
0.5A |
|
Weight |
0.3 kg |
0.3 kg |
*1: The applicable transmission speed depends on the communication function, subsystems, and connection method.
An FCS collects data from subsystems or sets data with control calculations to subsystems using the builder functions by way of serial communication modules. A communication module selects only one communication function, thus
two ports must have identical communication functions. It is not possible to select different communication function for every port. The communication functions and those transmission speeds for each communication module are as shown in the table below.
Table Communication Functions for Communication Modules
Communication function |
ALR111 |
ALR121 |
FA-M3 communication |
DR |
DR |
Modbus communication |
DR |
DR |
MELSEC-A communication |
DR |
DR |
YS communication with direct connection |
NIL |
SG |
YS communication |
NIL |
SG |
SLC500 communication |
SG |
SG |
日本横河公司集散控制系统(DCS)STARDOM概述
1、DCS 硬件的详细描述及控制功能
处理器,电源,以太网络全部配置成冗余工作的方式,而且功能强大的操作软件及服务器软件可以保证控制系统
系统结构图
下面描述一个典型的DCS系统的主要配置。
在这个实例中,5个分控站分别配置了5套最先进的系列控制站和操作站,其中控制站全部采用冗余的控制方式,即双控制器,双电源,双通讯卡,实现控制系统完全冗余,保证系统在主控制器发生故障时,无扰动的切换到后备控制器进行工作,而不会影响