Compoway/F Communications Procedures - Omron E5AN Communications Manual

SECTION 2
CompoWay/F Communica-
tions Procedures
Read this section if you are to communicate using the CompoWay/F format.
2.1 Data Format.................................................................. 2-2
Command Frame................................................... 2-2
BCC Calculation Example ........................ 2-3
Response Frame ................................................... 2-3
Communications Data ........................................... 2-4
End Code Example................................................ 2-4
2.2 Structure of Command Text .......................................... 2-6
PDU Structure ....................................................... 2-6
Area Definitions ..................................................... 2-6
Type Code (Variable Type) ................................... 2-6
Addresses.............................................................. 2-7
Number of Elements.............................................. 2-7
List of Services (Main Request Codes and
Sub-Request Codes) ............................................. 2-7
2.3 Detailed Description of the Services............................. 2-9
Read Variable Area ............................................... 2-9
Write Variable Area ............................................. 2-10
Composite Read from Variable Area................... 2-12
Composite Write to Variable Area ....................... 2-13
Read Controller Attributes ................................... 2-16
Read Controller Status ........................................ 2-17
Echoback Test..................................................... 2-18
Operation Command ........................................... 2-19
2.4 Response Code List ................................................... 2-26
2-1