User's Manual

Page 17
READ STATUS
Use
This command is used to get coupler parameters (communication speed…).
Prototyping
• Command sent : F2h
• Command type : ISO out
Host 80h F2h P1 P2 01h
Coupler F2h Read bytes 90h 00h
Parameters
P1: type of parameter to read
B7-b2 B1-b0
0 (RFU) Parameter
b1-b0 : Parameter location
• 00 : Parameter value is read in coupler’s EEPROM (setting when power on)
• 01 : Coupler’s I/O
• 10 : Reserved for Future Use
• 11 : Parameter value is read in coupler’s RAM (current setting)
P2: set the parameter address to read
Valid values for P2 according to P1 value:
• EEPROM: 00h to FFh.
• I/O: 05h and 07h.
• Parameter: 50h to 6Fh.
Response : byte value at the transmitted address + status word
Note: When reading the I/O, the Read byte returned indicates the IN1, OUT1, OUT2 pin states as follows:
(OUT2P is connected to VDD via a 1kW - resistor).
I/O Address B7 B6 B5 B4 B3 B2 B1 B0
05h : output - - - - OUT2 OUT1 - -
07h : Input - - - - - - - IN
Couplers - Reference Manuel V1.3