Specifications

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RS-232C Communication with PC 33

7.6 RS-232C Data Transmission Formats

The basic data transmission string format output by the DC-782 is as follows (with a more detailed discussion of

each element below)

Data Format Without Additional Parity (Total 37 Bytes):

Data Format With Additional Parity (Total 38 Bytes)

NOTE: If the additional parity is 0x0d, 0x0a or 0x00, it

will be changed to 0x1d, 0x1a or 0x10 respectively.

Status Flag:

Bit 7: Not used; always set to zero.

Bit 6: Fixed to 1.

Bit 5: Not used.

Bit 4: Not used.

Bit 3: Not Used

Bit 2: Quantity Overflow - 0: when

no overflow, 1: when overflow

Bit 1: Net - 0: when tare subtraction not performed, 1: when tare subtraction performed

Bit 0: Additional Parity Flag - 0: when additional

parity flag not added in text, 1: when flag is added

Command ENQ Enquiry 0x05

ACK Acknowledge 0x06

NAK Not Acknowledge 0x15

Header

Code

Status

Flag

Weight Condition

Flag

CR Header

Code

Net

Weight

CR Header

Code

Ta re

Weight

1 Byte 1 Byte 1 Byte 1 Byte 1 Byte 6 Bytes 1 Byte 1 Byte 6 Btye

CR Header

Code

Unit

Weight

CR Header

Code

Quantity CR LF

1 Byte 1 Byte 6 Bytes 1 Byte 1 Byte 6 Bytes 1 Byte 1 Byte

Header

Code

Status

Flag

Weight Condition

Flag

CR Header

Code

Net

Weight

CR Header

Code

Ta re

Weight

1 Byte 1 Byte 1 Byte 1 Byte 1 Byte 6 Bytes 1 Byte 1 Byte 6 Btyes

CR Header

Code

Unit

Weight

CR Header

Code

Quantity CR Additional

Parity

1 Byte 1 Byte 6 Bytes 1 Byte 1 Byte 6 Bytes 1 Byte 1 Byte 1 Byte

Not

Use

Fixed to

Not

Used

Not

Used

Not

Used

Quantity

Overflow

Net Additional

Parity

Table 7-1. RS-232C Codes, Headers, Fields and Commands