3 SPECIFICATIONS
3.4 Serial Communication Module Function List
The following table lists the functions of the Q series C24.
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| Communication with QnA compatible 3C frame |
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| Communication with | Communication with QnA compatible 4C frame | Formats 1 to 4 |
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| ASCII code | Communication with QnA compatible 2C frame | exist for each. |
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| Communication with A compatible 1C frame |
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| Communication with | Communication with QnA compatible 4C frame | Format 5 |
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| binary code |
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| Batch read/write in bit/word units |
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| Communication | Read/write of device | Monitoring of device memory |
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| Batch read/write of multiple blocks |
| Chapter 5 | |||
| using MC protocol | memory |
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| Read/write by extension designation |
| Reference Manual | |||
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| Accessing other stations via network system |
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| Reading/writing from/to the buffer memory of the Q series C24 |
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| Reading/writing from/to the buffer memory of intelligent function modules |
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| Reading/writing from/to sequence program files |
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| Monitoring the PLC CPUs (PLC CPU monitoring function) |
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| Status control of the PLC CPUs (remote RUN/STOP, etc.) |
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| Turning on/off input signals of the Q series C24 from an external device (global function) |
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| Data transmission from a PLC CPU to an external device |
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| Data transmission/reception in any format |
| Chapter 6 | |
| Communication | Data transmission/reception using user frames |
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| using non | Data reception by interrupt programs |
| User's Manual | ||
| procedure protocol | Monitoring the PLC CPUs (PLC CPU monitoring function) |
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( | 2) | ASCII data transmission/reception by |
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| Data transmission/reception by specifying transparent code |
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| Communication | Data transmission/reception in any format |
| Chapter 7 | ||
| Data reception by interrupt programs |
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| using bidirectional |
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| ASCII data transmission/reception by |
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| protocol ( 1) |
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| Data transmission/reception by specifying transparent code |
| User's Manual | |||
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| Communication via | Communication with MC Protocol/non procedure protocol/bidirectional protocol |
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| public network, etc. | PLC access from GX Developer |
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| (modem function) |
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| Transmission | DC code control (including Xon/Xoff control) |
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| control | DTR/DSR (ER/DR) control |
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| Independent/linked operation of each interface |
| Section 4.5.2 | |||
| Monitoring/testing of initial settings and setting values with utility software |
| Chapter 8 | |||
| Supporting multiple CPU system |
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| Section 3.3.3 of |
| Remote password check |
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| (Application) |
1 If the external device is capable of incorporating a program and communicating data using a protocol of the MELSEC PLC, it is possible to access the PLC CPU using the above mentioned MC protocol. Furthermore, it is possible to transfer any data using the bidirectional protocol.
2 When it is necessary to communicate using the protocol of an external device, such as a measuring instrument or a bar code reader, the
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