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GSK980TDi Turning CNC System User Manual
384
Ⅲ
Connection
Fig. 2-28 Separate connection between the emergency stop and travel switch
z
Control logic
(1) Series connection between the emergency stop and travel switch
When the contact of the emergency stop switch is cut off, the ESP signal is off to +24V, and CNC
makes an emergency alarm. Meanwhile the CNC turns off the enable (EN) signal to stop the pulse
output. Except the functions processed by NC, other functions can also be defined by PLC program
when the emergency alarm is issued. The function defined by standard PLC program is: when
emergency alarm is issued, it turns off the signal output of M03, M04, M08, and outputs M05 signal at
the same time.
(2) Separate connection between the emergency stop and travel switch
1. Each axis has only one overtravel contact, and the system judges the overtravel alarm
based on the axis movement direction.
2. When the system alarms for the overtravel, the axis moves reversely, the reset key is
pressed to clear the alarm after the axis exceeds the limit position.
Note: Before the overtravel limit function is enabled, the slider must be between the positive and the negative
limit; otherwise, the prompted alarm will not be consistent with actual situation.
2.9.2 Tool Change Control
z
Relevant signals (by standard PLC program)
Ladder diagram supports 4 kinds of tool-post controllable logic; refer to the tool-change logic for
the Signal Specification.
z
Control parameter
Bit parameter
K 1 1 CHOT
CHET
TCPS
CTCP
TSGN
CHTB CHTA
CHTA: tool change mode selection bit 0
CHTB: tool change mode selection bit 1
（
see following table
）
TSGN =0 : tool signal HIGH(turn on +24V) is valid
=1 : tool signal LOW(turn off +24V) is valid
CTCP =0 : do not check tool post locking signal
=1 : check tool post locking signal
CHTB CHTA
Tool post type
0 0
Standard tool change mode B
0
1
Standard tool change mode A
1 0
Yantai
AK31
1 1
Unused
