Host Communication Commands; Pck Ethernet & Rs-232 Communication Protocol - Symbol MK1000 Product Reference Manual

Host Communication Commands

Table 5-2 lists the commands used in host communications.
Control Character
<STX>
<ETX>
<SOH>
<EOT>
<DATA>
<LRC>
<ADDR>
<ENQ>
<ACK>
<NAK>
PCK Ethernet & RS-232 Communication Protocol
When communicating to the host terminal via Ethernet or RS-232, MK1000 data is
formatted as follows:
<STX> <DATA> <ETX> <LRC>
Table 5-2. Host Communication Commands
Hex Representation
02
03
01
04
00-FF
00-FF
30-4F
05
06
15
Description
ASCII Start of Text
ASCII End of Text
ASCII Start of Header
ASCII End of Transmission
Data packet. This is the actual data being
sent to the MK1000. The maximum size of
the packet is 300 bytes, but under 50 is
recommended for accurate communication.
Used for error detection, LRC is the
Exclusive-OR (XOR) of all characters in
<DATA> and the <ETX>.
The address of the MK1000 when used in a
485 network. Each unit is assigned a unique
address.
ASCII Enquiry
ASCII Acknowledge
ASCII Negative Acknowledge
PCK Emulation
5-3