4 SETTINGS AND PROCEDURES PRIOR TO OPERATION
(a)Transmission setting (CH1 side: switch 1 (lower level); CH2 side: switch 3 (lower level))
b7 | b6 | b5 | b4 | b3 | b2 | b1 | b0 |
CH1 side
CH2 side
| Bit | Description | OFF (0) | ON (1) | Remarks |
| |||||
| b0 | Operation setting | Independent | Link | Must be set to OFF on CH1 |
| |||||
| b1 | Data bit | 7 | 8 | Parity bit is not included |
| b2 | Parity bit | NO | Yes | Vertical parity |
| b3 | Even/odd parity | Odd | Even | Valid only when parity bit is set to |
| Yes | ||||
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|
|
|
| |
| b4 | Stop bit | 1 | 2 | — |
| b5 | Sum check code | NO | Yes | — |
| b6 | Write during RUN | Prohibited | Allowed | — |
| b7 | Setting modifications | Prohibited | Allowed | — |
All items listed in the table should be set to OFF for the interfaces for which "GX Developer connection" is set in the communication protocol setting.
If connecting directly to the GX Developer, it operates with the setting value on the GX developer. (Refer to the description below.)
Transmission setting | Setting description for GX Developer |
Operation setting | Independent |
Data bit | 8 |
Parity bit | Yes |
Even/odd parity | Odd |
Stop bit | 1 |
Sum check code | Yes |
Write during RUN | Allowed |
Setting modifications | Allowed/Prohibited |
1)Operation setting
•This sets whether to use each of the two Q series C24 interfaces for independent data communication, or to use the two for linked data communication.
•The setting and data flow for linked operation is explained in (2).
2)Data bit setting
•This sets the bit length for one character in data communicated with an external device according to the specifications of the external device. (When data communication is performed using format 5 of the MC protocol (for binary code communication), it is necessary to set it to 8 bits when processing the sum check code with the bidirectional protocol.)
•If 7 bits are set, the data is communicated by ignoring the most significant bit (8th bit).
3)Parity bit setting
•This sets whether or not a parity bit (vertical parity) is added for one byte of transmission/receive data, according to the specifications of the external device.
•The addition of the parity bit to the transmission data and the checking of the parity bit of receive data are performed by the Q series C24.
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