Toshiba 6F3B0250, PROSEC T1 T1S user manual CPU register « T1S RS-485 port T1S only Receiving

6F3B0250

7. Instructions

CPU register « T1S RS-485 port (T1S only)

<Receiving>

When the instruction input is ON, one set of message (from start character to the trailing code) which is received by the RS-485 port is read from the receive buffer, and stored in the CPU registers. The transfer size is fixed to 256 words. The execution status and the message length (in bytes) are stored in the status flag.

The instruction input must be kept ON until the receiving operation is complete.

Example

D0000

D0001

Source designation

H0030

00000

T1S RS-485 port

Transfer size

D0002 00256 (fixed)

D0003 Execution status

D0004 Message length

Destination designation

D0005 H0004

D0006 00100

D0100 (CPU register)

When R0000 is ON, one set of received message is read and stored in D0100 and after.

Execution status:H0000 ... Normal complete

H0001 ... Communication error (parity error, framing error)

H0002 ... Message length over (more than 512 bytes)

H0003 ... Receive buffer over flow

H0004 ... Receive time-out (from start character to the trailing code)

Baudrate	Time-out setting
300, 600, 1200 bps	30 seconds
2400 bps	15 seconds
4800 bps	7 seconds
9600 bps	3 seconds
19200 bps	1.5 seconds

Message length: 0 .............. No receive message

1 to 512 ... Message length in bytes

Note

·The XFER instruction is not executed as error in the following cases. In these cases, the instruction error flag (ERF = S051) is set to ON. If the ERF is set to ON once, it remains ON until resetting to OFF by user program.

(1)The leading address for the RS-485 port designation is other than 0.

(2)Transfer size is other than 256.

(3)Mode setting of the RS-485 port is not the free ASCII mode.

(4)This instruction is programmed in the sub-program #1.

Basic Hardware and Function 261

CTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net