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1 OVERVIEW
MELSEC-Q
1.3 About Added/Changed Functions in Function Version B
Simultaneous connection of
GX Developer and GOT
Control of RS and DTR signal states
Support for 230,400 bps
Data transmission/reception at low speed
Clearing reception data by a dedicated instruction
Transmission of the PLC
CPU monitoring information through combined use of the modem function
Remote password check
Automatic initialization for modem
Callback
Function
Addition of non reception monitoring time format in non procedure protocol
Transmission control start/end free area designation
Addition of changeable data to the user frame
(05
H
, 0B
H
, 11
H
, 17
H
)
Addition of changeable data to the user frame
(04
H
, 0A
H,
E5
H,
EB
H
)
The table below lists the functions that have been added or changed in the Q series
C24 of function version B.
See Section 2.6 for the function version, serial NO. and software version of products
(CPU module, GX Developer, GX Configurator-SC) related to the Q series C24 which can use added/changed functions.
See Appendix 1.1 concerning a comparison of functions in the different Q series C24 function versions.
QJ71C24N
(-R2/R4)
QJ71C24
(-R2)
Outline of function Reference section
This function allows access to the PLC from a PC with GX Developer and a
GOT connected to two different interfaces of the Q series C24 at the same time.
This function allows the control of the on or off state of the RS and DTR signals with the PLC program.
This function allows data communication with an external device at a transmission speed of 230,400 bps.
This function allows data communication with an external device at a transmission speed of 50 bps.
This function allows clearing reception data using the CSET instruction during data communication using the non procedure protocol.
It is possible to clear the data even when data is being transmitted.
Section 1.2 of
User’s Manual
(Basic)
Remark of section
3.2.1
Chapter 4 of
User’s Manual
(Basic)
Chapter 6, Section
9.8 of User’s
Manual (Basic)
When the PLC CPU monitoring function is active, this function sends the monitoring information of the PLC CPU to the external device through the modem.
This function allows data communication after the external device completes the unlock processing of the remote password set at a QCPU. It is executed when the QCPU is accessed from a remote location using the modem function of the Q series C24 in the following forms of data communication:
• Communication using the MC protocol
• Communication using GX Developer
Initializes the modem automatically when Q Series C24 starts up.
After line connection from the GX Developer, access to the QCPU from the
GX Developer is made possible through line reconnection from the Q Series
C24 (callback). Transmission costs after line connection from the Q Series
C24 side are borne by the Q Series C24 side.
This function allows messages to be received in the non reception protocol by time-out in non reception monitoring time (timer 0) if the received complete code and received data count have been not determined.
This function allows the designation of the available capacity of the OS area that notifies the data reception failure at the time of transmission control
(DTR/DSR signal control and DC code control).
Chapter 2 of
User’s Manual
(Application)
Chapter 3 of
User’s Manual
(Application)
Section 3.18 of
Reference Manual
Chapter 3 of the
User’s Manual
(Application)
Chapter 6 of
User’s Manual
(Application)
Chapter 7 of
User’s Manual
(Application)
These functions allow the following codes to be registered as the changeable data of user frames for data communication.
• Horizontal parity code
• Sum check code of two’s-complement number
Chapter 9 of
User’s Manual
(Application)
Adding a reception function through the use of user frames
This function allows reception of a message consisting of the head frame and any data field when receiving data by specifying the head frame.
The data length of the data field can be specified freely for each combination of user frames for reception set by the user.
(Receiving 1 byte providing ACK/NAK only is also possible by setting the data length of the data field to “0.”)
Chapter 11 of
User’s Manual
(Application)
1 - 10 1 - 10
1 OVERVIEW
MELSEC-Q
Support for multiple CPU system
Function
Multiple specification of transparent codes for transmission
Switching to the GX
Developer connection mode by switching the mode
Communication data monitoring function
UINI instruction
QJ71C24N
(-R2/R4)
QJ71C24
(-R2)
Outline of function Reference section
This function allows specification of a maximum of 10 types of transparent codes for transmission per interface when sending data using one of the following protocols:
• Non procedure protocol
• Bidirectional protocol
Chapter 12 of
User’s Manual
(Application)
This functions allows the GX Developer connection mode to be switched by an external device or the PLC CPU.
This function allows the monitoring of communication data transmitted on the communication network of the Q series C24 and an external device.
Chapter 15 of
User’s Manual
(Application)
Section 3.13 of
Reference Manual
Chapter 16 of
User’s Manual
(Application)
Operating Manual
(Protocol FB support function)
Chapter 17 of
User’s Manual
(Application)
The UINI instruction allows change of the mode, transmission specifications and host station No. of the Q series C24.
This function allows access to the control/non-control PLCs specified by the user when performing the following forms of data communication with a multiple CPU system:
• Communication using the MC protocol
• QCPU access from GX Developer
Section 2.10 of
Reference Manual
1 - 11 1 - 11
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