The >1. introduction Shanghai Yongxin color
television limited liability company is develops, the production
colored monitor primarily industry, technology crowded
knowledge-intensive state-owned major industry. Along with the
charactron output enhancement, this company original production
equipment has not been able to meet the production needs, needs to
start immediately the new special purpose equipment. In newly
goes into production in the equipment, the our company has undertaken
the painter's brush sealing machine electricity control section
development work.
2. control systems hardware selects the sealing machine is
completes the color television packing nitrogen, the seal
electromagnetism gun machine, is in the painter's brush production
essential equipment. Entire wrap machinery for entire automated
control. Because must simultaneously control 3 axes, the present
small PLC single plane generally only can simultaneously output 2
groups channels to control 2 sets of servos, therefore must utilize
between PLC the communication function, in this aspect Fuji PLC simple
communication way, the human nature programming contact surface happen
to can satisfy our request. Therefore we selected the Fuji UG20
series to touch the screen, in Fuji SPB series 2 PLC and 2 RS485
communication module, smoothly constituted to three sets of servo
electrical machinery control system.
3. applications programming
In 3-1 control diagram position machine Fuji touches
screen POD Fuji PLC SPB - 1 Fuji PLC SPB - 2 to be responsible to
control the rifle stock the servo electrical machinery to be
responsible to control the flame the servo electrical machinery to be
responsible to control to the center servo electrical machinery
In 3-2 control system synopsis control system each part
of functions distinction as follows: (1) through touches the
screen to input function and so on craft parameter, off-line
debugging, manual movement; (2) two PLC is responsible to
control three servo electrical machinery the movement. On the
position machine gives PLC according to the work succession output
correspondence start signal, PLC controls each servo electrical
machinery revolution, after correspondingly works the step to
complete, the PLC feedback completes the signal to on position
machine.
Touches between the screen partial POD man-machine contact
surface and SPB1 selects 1:1 communication method, the picture divides
into the basic picture, the automatic picture, the simulation picture,
the hypothesis picture, the manual picture, reports to the police the
picture altogether six parts. Among: The basic picture
mainly completes automatic picture and so on the between picture,
simulation picture cut; Automatic picture mainly to system
automatic movement when the system working procedure, various axes
position, the running status as well as the breakdown code carry on
the monitoring. The simulation picture mainly uses in the
off-line debugging work, may simulate the instruction through the
picture in pressed key and the indicating lamp which on the position
machine sends out, demonstrated various servo the position condition,
brings the convenience for the entire machine debugging. In the
hypothesis picture carries on the establishment to in various servo
axis movement work step position speed. The manual picture
carries on the manual low-speed control facing various servo axis,
mainly uses in to debug the servo. Reported to the police in the
picture to record each kind of breakdown information which in the
system movement occurred, like the servo reported to the police, the
servo moves the ultra regulation, PLC reports to the police,
information and so on main engine breakdown.
PLC partial PLC main solution to servo control,
because between between three exchanges servos movement control has
the fast linkage, therefore to between POD, SPB1, the SPB2 data
communication high speed, was safe, the reliable performance set a
higher request. But Fuji PLC provides the communication function
has completely satisfied this aspect request, moreover the connection
method is simple, debugging convenience. Takes between SPB1 and
the SPB2 data communication gives an example, we use CPU the link this
intercom way. SPB1 and SPB2 respectively connect a RS-485
communication adapter, between the adapter segment way selects 485
communications methods. Connection diagram as follows:
Each PLC may establish the biggest 32 characters the data to
check the region to use in mutually to read takes. Here, we
suppose the SPB1 communication pattern are CPU link, the station
number suppose are 00, 共用?the site size supposes is 32
characters, the corresponding address is D1E00~D1E1F.
Supposes the SPB2 communication pattern is CPU link, the station
number supposes is 01, 共用?the site size supposes is 32
characters, the corresponding address is D1E20~D1E3F. In
exchanges in the servo operating control, because in the craft
confidentially requests the servo electricity to carry on
continuously, the multi- spots position high speed localization, the
use increase type localization instruction appears is not very
convenient. According to the former numerical control engine bed
programming experience, we used in the PLC absolute value programming
instruction to control the servo positioning, this caused each
position relative zero point all is fixed. In movement so long
as unceasingly changes absolute location value this variable to be
able the extremely simple realization servo positioning control.
4. subtotals this set of productions unit at present already
invested produces the nearly for 2 months, the movement stably is
reliable. Specially the man-machine contact surface convenient
operating mode receives the scene operator's high praise. We
also feel, in the servo movement control, uses Fuji PLC and the Fuji
man-machine contact surface is a good choice. Low end small Fuji
PLC has 2 channels pulses output in particular, each channel output
frequency reaches as high as 100KHz, but also has consummates Yi Yong
the correspondence function, its natural price compared to has the
very big competitive advantage in small PLC. |
