140DAI74000模块现货

140DAI74000

两个、三个位置的滑动开关位于CPU的前部。左派
当处于顶部位置且无内存时，开关用于内存保护
中间和底部位置的保护。上的三位滑动开关
右侧用于选择Modbus（RS-232）端口的通信参数设置。
下图显示了140CPU43412可用的三个选项
单元
将滑动开关设置到顶部位置将ASCII功能分配给端口；这个
以下通信参数已设置且无法更改。
将滑动开关设置到中间位置将分配远程终端单元（RTU）
端口的功能；以下通信参数已设置，不能
改变。
注：当前面板开关处于以下状态时，CPU硬件默认为桥接模式
设置为RTU或ASCII模式。连接控制器时，面板设备连接
到CPU，Modbus端口可以与控制器通信
连接，以及登录Modbus Plus网络上的任何节点。
ASCII通信端口参数
波特率2400
奇偶
数据位7
停止位1
设备地址后面板旋转开关设置
RTU通信端口参数
波特率9600
奇偶
数据位8
停止位1
设备地址后面板旋转开关设置
ASCII码
RTU
不使用mem
关
记忆
prt
CPU模块
172 840使用100 00 2002年9月
将滑动开关设置到底部位置，可以分配通信
软件中端口的参数；以下参数有效。
有效的通信端口参数
波特率19200 1200
9,600 600
7,200 300
4,800 150
3,600 134.5
2,400 110
2,000 75
1,800 50
奇偶校验启用/禁用
奇数/偶数
数据位7/8
停止位1/2
设备地址1…247
CPU模块
840使用100 00 2002年9月173
后面板
开关
两个旋转开关（见下图和表格）位于后部
CPU的面板。它们用于设置Modbus Plus节点和Modbus端口
地址。
SW1（顶部开关）设置地址的高位（十位）；SW2（底部
开关）设置地址的低位数字。下图显示了
示例地址11的正确设置。
下图显示了SW1和SW2。
下表显示了SW1和SW2地址设置。
注：这些开关可设置的高地址为64。
注：如果选择“0”或大于64的地址，Modbus+LED将
“on”稳定，表示选择了无效地址。
SW1和SW2地址设置
节点地址SW1和SW2
SW1（顶部）
SW2（底部）
CPU模块
174 840使用100 00 2002年9月
按键开关：按键开关用于在
控制器正在运行。下图显示了按键开关。

140DAI74000

140DAI74000

Two, three-position slide switches are located on the front of the CPU. The left
switch is used for memory protection when in the top position and no memory
protection in the middle and bottom positions. The three-position slide switch on the
right is used to select the comm parameter settings for the Modbus (RS-232) ports.
The following figure shows the three options that are available for the 140CPU43412
module.
Setting the slide switch to the top position assigns ASCII functionality to the port; the
following comm parameters are set and cannot be changed.
Setting the slide switch to the middle position assigns remote terminal unit (RTU)
functionality to the port; the following comm parameters are set and cannot be
changed.
Note: The CPU hardware defaults to bridge mode when the front panel switch is
set to RTU or ASCII mode. When networking controllers, a panel device connected
to the CPU Modbus port can communicate with the controller to which it is
connected, as well as log into any nodes on the Modbus Plus network.
ASCII Comm Port Parameters
Baud 2,400
Parity Even
Data Bits 7
Stop Bits 1
Device Address Rear panel rotary switch setting
RTU Comm Port Parameters
Baud 9,600
Parity Even
Data Bits 8
Stop Bits 1
Device Address Rear panel rotary switch setting
ASCII
RTU
not used mem
off
mem
prt
CPU Modules
172 840 USE 100 00 September 2002
Setting the slide switch to the bottom position gives you the ability to assign comm
parameters to the port in software; the following parameters are valid.
Valid Comm Port Parameters
Baud 19,200 1,200
9,600 600
7,200 300
4,800 150
3,600 134.5
2,400 110
2,000 75
1,800 50
Parity Enable/Disable
Odd/Even
Data Bits 7 / 8
Stop Bits 1 / 2
Device Address 1 ... 247
CPU Modules
840 USE 100 00 September 2002 173
Rear Panel
Switches
Two rotary switches (see the following illustration and table) are located on the rear
panel of the CPU. They are used for setting Modbus Plus node and Modbus port
addresses.
SW1 (the top switch) sets the upper digit (tens) of the address; SW2 (the bottom
switch) sets the lower digit (ones) of the address. The illustration below shows the
correct setting for an example address of 11.
The following figure shows SW1 and SW2.
The following table shows the SW1 and SW2 address settings.
Note: The highest address that may be set with these switches is 64.
Note: If "0" or an address greater than 64 is selected, the Modbus + LED will be
"on" steady, to indicate the selection of an invalid address.
SW1 and SW2 Address Settings
Node Address SW1 SW2
SW1 (TOP)
SW2 (BOTTOM)
CPU Modules
174 840 USE 100 00 September 2002
Key Switch The key switch is used to protect memory from programming changes while the
controller is in operation. The following figure shows the key switch.