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298
Communication
command
2
mode
C
• Read out of External Scale
Reception data
0
axis
checksum
2C
Status (L)
• AT500 series
Status (H)
*3 bit5 : Logical sum of bit0 to bit 5 of status (L) *4 bit4 : logical sum of bit6 and bit 7 of status (L)
Transmission data
• Absolute position data = 48bit (0 x 800000000000 to 0 x 7FFFFFFFFFFFh)
bit7
Thermal alarm
6
0
5
Communication
error
4
CPU, memory
error
3
Capacity and
photoelectric
error
2
Encoder
non-matching
error
1
Initialization
error
0
Over speed
bit7
0
6
0
5
Encoder
error *3
4
Encoder
alarm *4
3
0
2
0
1
0
0
0
Status (L)
Encoder ID
• ST771
Status (H)
*1 bit5 : Logical sum of bit0 to bit 5 of status (L) *2 bit4 : logical sum of bit6 and bit 7 of status (L)
bit7
Thermal alarm
6
Signal intensity
alarm
5
Signal intensity
error
4
Transducer
error
3
ABS detection
error
2
Hardware
error
1
Initialization
error
0
Over speed
bit7
0
6
0
5
Encoder
error *1
4
Encoder
error *2
3
0
2
0
1
0
0
0
Error code
bit7
0 : Normal
1 : Error
65
Command error
4
RS485 error
3210
• Command error occurs at other control modes than full-closed control.
0Bh
axis
encoder ID (L)
(H)
status (L)
(H)
(L)
absolute position data (48bit)
(H)
error code
checksum
2C
ST771 Address "0" data of EEPROM 32h
Encoder ID (L) Encoder ID (H)
AT500series Address "0" data of EEPROM 31h