7-36
7.5 Communication Function: General-purpose Serial
Communication
7.5.1 General-purpose Serial Communication
Overview
•
In general-purpose serial communication, data is sent and received over the COM ports to and from an
external device such as an image processing device or a bar code reader.
•
Data is read from and written to an external device connected to the COM port by means of an FP
Σ
program and the FP
Σ
data registers.
Outline of operation
To send data to and receive it from an external device using the general-purpose serial communication
function, the data transmission and data reception functions described below are used. The F159
(MTRN) instruction and the “reception done” flag are used in these operations, to transfer data between
the FP
Σ
and an external device.
Sending data
Data to be transmitted from the PLC is stored in the data register used as the send buffer (DT). When
F159 (MTRN) is executed, the data is output from the COM port.
•
The terminator specified in the system
register is automatically added to the data
that has been sent.
•
The maximum volume of data that can be
sent is 2048 bytes.
Содержание FP E Series
Страница 1: ......
Страница 16: ......
Страница 17: ...Chapter 1 Functions and Restrictions of the Unit ...
Страница 28: ...1 12 ...
Страница 29: ...Chapter 2 Specifications and Functions of the Unit ...
Страница 37: ...2 9 Circuit diagram C32 Y0 Y1 Y3 Y4 C28 Y0 Y1 Y3 Y4 Y2 Y5 to YF Y2 Y5 to YB ...
Страница 48: ...2 20 ...
Страница 49: ...Chapter 3 Expansion ...
Страница 56: ...3 8 Terminal layout diagram Note The numbers in the connector are for the first expansion ...
Страница 61: ...Chapter 4 I O Allocation ...
Страница 66: ...4 6 ...
Страница 67: ...Chapter 5 Installation and Wiring ...
Страница 90: ...5 24 ...
Страница 91: ...Chapter 6 High speed counter Pulse Output and PWM Output functions ...
Страница 116: ...6 26 ...
Страница 121: ...6 31 ...
Страница 125: ...6 35 Pulse output diagram ...
Страница 131: ...6 41 ...
Страница 139: ...6 49 ...
Страница 141: ...6 51 ...
Страница 144: ...6 54 Program Continued on the next page ...
Страница 145: ...6 55 ...
Страница 147: ...6 57 Program ...
Страница 151: ...Chapter 7 Communication Cassette ...
Страница 202: ...7 52 Procedure of communication In the following example the Micro Imagechecker is connected to COM1 port ...
Страница 210: ...7 60 The values of DT50 and DT51 are written in DT0 and 1 of PLC ...
Страница 238: ...7 88 ...
Страница 239: ...Chapter 8 Self Diagnostic and Troubleshooting ...
Страница 247: ......
Страница 248: ......
Страница 249: ...Chapter 9 Precautions During Programming ...
Страница 260: ...9 12 Example 2 Using the CT instruction between JP and LBL instructions ...
Страница 268: ...9 20 ...
Страница 269: ...Chapter10 Specifications ...
Страница 286: ......
Страница 287: ...Chapter 11 Dimensions ...
Страница 290: ...11 4 11 1 3 Expansion Unit FPG XY64D2T FPG XY64D2P FPG EM1 ...
Страница 293: ...Chapter 12 Appendix ...
Страница 297: ...12 5 ...
Страница 437: ...12 145 12 7 ASCII Codes ...
Страница 439: ......
Страница 440: ......