一台数控加工中心是840C用的是S5的PLC，现在主轴不能自动换到高档即以Q9.2不能输出，通过与另一台一样的机器（好的）对比，我发现是当输入S＝1500转时 D 0.0就变为1了，此时F141.1就变为1. Q 9.2变为1了。当输入S＝500转时D0.0 D0.1 D0.2都为0了，F141.0变为1 F141.1为0 Q9.3就变为1，低档成功。
PB21

C DB 31
AN D 0.0 SPINDLE SET GEAR STAGE A
AN D 0.1 B
AN D 0.2 C
= F 141.0
A D 0.0
AN D 0.1
AN D 0.2
= F 141.1
A I 2.5 SPINDLE GEAR SENSOR 1
= F 160.0
A I 2.6 SPINDLE GEAR SENSOR 2
= F 160.1
BLD 130
A F 160.0
R D 1.0 ACTUAL GEAR STAGE A
R D 1.1 B
R D 1.2 C
A F 160.1
S D 1.0
R D 1.1
R D 1.2
BLD 130
O(
A F 141.0
A F 160.0
)
O(
A F 141.1
A F 160.1
)
R D 0.7 CHANGE GEAR
BLD 130
A D 1.14 SPINDLE CONTROLLER ENABLE
AN D 3.8 SPINDLE DISABLE
A D 2.0 PLC SPINDLE CONTROL
A D 2.6 OSCILLATION SPEED
= F 190.7
BLD 130
C DB 10
A F 190.7
= D 9.8 READ-IN DISABLE
C DB 31
O
A D 0.7
A F 190.7
A(
O(
A F 141.0
A D 0.7 CHANGE GEAR
)
O F 160.6
)
O
AN D 0.7
A F 141.0
S Q 9.3 SPINDLE BOX VALVE 2
R Q 9.2 SPINDLE BOX VALVE 1
BLD 130
O
A D 0.7
A F 190.7
A(
O(
A F 141.1
A D 0.7 CHANGE GEAR
)
O F 160.7
)
O
AN D 0.7
A F 141.1
S Q 9.2
R Q 9.3
BLD 130
***
C DB 31
A D 0.7 CHANGE GEAR
A D 0.11 SPINDLE STOP
S F 155.1
AN D 0.7
R F 155.1
BLD 130
A(
A D 0.11
A F 155.2
A(
O F 161.0
O F 161.1
)
)
A F 156.7
AN F 160.4
AN F 160.5
S F 155.3
BLD 130
O F 160.4
O F 160.5
R F 155.3
BLD 130
O F 155.1
O F 155.3
O(
A I 9.1
A F 155.2
)
= D 2.0 PLC SPINDLE CONTROL
BLD 130
A I 9.1 SPIDLE JOG MODE
A F 155.2
= D 2.5 BASIC SPEED
BLD 130
O F 155.1
O F 155.3
= D 2.6 OSCILLATION SPEED
BLD 130
A F 0.7 FLASHING FREQUENCY 0.5 HZ
AN F 185.0
= F 185.1
A F 185.1
S F 185.0
AN F 0.7
R F 185.0
A F 185.1
A F 185.3
= F 185.2
A F 185.1
AN F 185.3
AN F 185.2
S F 185.3
A F 185.2
R F 185.3
BLD 130
A F 185.3
A(
O F 155.1
O F 155.3
)
= D 2.7 SET ROTATION CW