长春地区西门子模块代理商

长春地区西门子模块代理商

应用

With the standard position switches, mechanical positions of moving machine parts are converted into electrical signals. Through their modular and uniform design and large number of variants, the devices can comply with practically all re in industry.

Devices are available with enclosure versions to suit the particular ambient conditions. Different control tasks can be performed with the contact blocks best suited for the particular purpose. And many different actuator variants are available to match the mechanical configuration of the moving machine parts. Dimensions, fixing points and characteristics are largely in accordance with the EN 50041 or EN 50047 standards.

The devices are suitable for use in any climate.

Standards

The switches comply with IEC 60947‑1 (Low-Voltage Controlgear, General) and IEC 60947‑5‑1 (Electromechanical Control Circuit Devices).

The mechanical design of the switch corresponds to the re of the fail-safe principle according to ISO 14119.

Approvals

AS-Interface according to IEC 62026‑2

The 3SF1 position switches are approved according to UL 508, UL 50 and UL 746-C.

Safety circuits

Standard IEC 60947‑5‑1 requires positive opening of the NC contacts. In other words, for the purposes of personal safety, the assured opening of NC contacts is expressly stipulated for the electrical e of machines in all safety circuits and marked in accordance with the standard IEC 60947‑5‑1 with the symbol (→).

With a 3SF1 safety switch with (→), SIL 2 according to IEC 2061/IEC 61508 or PL c according to ISO 13849‑1 can be attained if the corresponding fail-safe evaluation units are selected from the ASIsafe program and correctly installed.

If a second 3SF1 safety switch with (→) is used, SIL 3/PL e can be attained.

为 PROFINET 通信口分配以太网地址
在 “Device View”中点击 CPU 上代表PROFINET 通信口的绿色小方块，在下方会出现PROFINET 接口的属性，在 “Ethernet addresses” 下分配IP 地址为 192.168.0.1 ，子网掩码为255.255.255.0，如图3. 所示。
图3. 分配IP 地址

同样方法，在同一个项目里添加另一个新设备S7-1200 CPU 并为其分配 IP 地址为192.168.0.2

创建 CPU之间的逻辑网络连接
在项目树 “Project tree”>“Devices & Networks” >“Networks view” 视图下，创建两个设备的连接。用鼠标点中 PLC_1 上的PROFINET通信口的绿色小方框，然后拖拽出一条线，到另外一个PLC_2 上的PROFINET通信口上，松开鼠标，连接就建立起来了，如图4所示。

建立两个 CPU的逻辑连接 

在 PLC_1 中调用并配置“TCON”、“TSEND”、“TRCV” 通信指令

1．在 PLC_1 的 OB1 中调用“TCON” 通信指令

① 在个 CPU 中调用发送通信指令，进入 “Project tree” > “ PLC_1” > “Program blocks” > “OB1” 主程序中，从右侧窗口 “Instructions” > “Communications” > “OPEN User Communications”下调用 “TCON” 指令，创建连接，如图5所示。

Type

 

3SF11.., 3SF12..

General data

Standards

IEC 60947‑5‑1, ISO 14119

Data according to AS-Interface specification

I/O configuration/ID configuration

0/B

ID1 code/ID2 code (hex)

F/F

Power consumption, overall

mA

≤ 60

Inputs

Low signal range

Contact open

High signal range

Contact closed, Iin dynamic (Ipeak ≥ 5 mA)

Status display

Green/red dual LED

Rated impulse withstand voltage U imp

kV

0.6

EMC immunity

IEC 61000-1-2

kV

4

IEC 61000-4-3

V/m

10

IEC 61000-4-4 (A/B)

1/2

Mechanical endurance

Basic switch

15 x 106 operating cycles

With separate actuator, 3SF1...‑..V..

1 x 106 operating cycles

PFH value

Probability of failure upon request of the safety function, with 1 actuation per hour and B10 = 5 x 106

1/h

4 x 10-9

2 x 10-9

Hinge switches, 3SF1...-..U..

Shock resistance according to IEC 60068‑2‑27

g/ms

30/11