Table of Contents
Advertisement
S5-115U Manual
Transmitting Data
•
The length of the frame to be transmitted (in bytes) must be entered in the first word of the
Send mailbox.
Send mailbox
Frame length
Data
•
The data to be transmitted must be entered in the remaining words of the Send mailbox.
•
Set bit 7 in the CBS (a rising edge triggers the transmission). The driver resets this bit when
transmission has been completed.
If data transmission is not possible, bits 0 to 6 of the CBS contain an error code describing the error
in more detail. Table 12-19 provides information on the meanings of the various error codes.
Bit 7
Send permitted:
A rising edge
initiates trans-
mission
EWA 4NEB 811 6130-02b
Word 1
Word 2
Word n
Figure 12-19. Structure of the Send Mailbox
Coordination Byte for Send (CBS)
Error code (see Table 12-19)
Figure 12-20. Structure of the CBS
Communications Capabilities
Bit 1
Bit 0
12-49
Advertisement
Table of Contents
