What is claimed is:
1. A sequence program editing apparatus comprising:
program storage means storing a sequence program;
duplication detecting means for detecting duplication of the same signal name assigned for different coils in the sequence program stored in said program storage device;
display means for displaying duplicated signal names detected by said duplication detecting means and locations of the duplicated signal names in the sequence program; and
signal-name rewriting means for rewriting the duplicated signal names displayed by the display means to eliminate the duplication of the same signal name assigned for the different coils.
2. A sequence program editing apparatus according to claim 1, further comprising selection means for allowing selection of signal names to be rewritten in the duplicated signal names displayed in said display means.
3. A sequence program editing apparatus according to claim 1, wherein said signal-name rewriting means includes means for rename contacts for the coils to which the same signal name is assigned, and renaming-range setting means for setting a range of renaming the contacts in the sequence program.
4. A sequence program editing apparatus according to claim 3, wherein said renaming-range setting means allows to set the renaming range for a divided unit of a main program and subprograms of the sequence program.
5. A sequence program editing apparatus according to claim 1, wherein said signal-name rewriting means comprises search-range setting means for setting a search range of signal names assignable to the different coils, extracting means for extracting signal names assignable to the different coils within the set search range, and rewriting means for rewriting the duplicated signal names to the extracted signal names.
6. A sequence program editing apparatus according to claim 1, further comprising communication means for communication with a programmable controller, wherein said duplication detecting means detects duplication of the same signal name assigned for different coils in a sequence program stored in the programmable controller.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A valve for a refrigeration system comprising:
a valve body having an inlet, and outlet, and a valve seat, and a cavity;
a port plate removably coupled to the valve body, and an inlet pressure passageway in fluid communication with the inlet port of the valve body and an outlet pressure passageway in fluid communication with the outlet port, such that the port plate functions to control a piston to open and close the valve;
a cartridge disposed within the cavity of the valve body, the cartridge being accessible without disconnecting the valve from the system by removing the port plate from the valve body, the cartridge having a piston that engages the valve seat to close the valve and that disengages the valve seat to open the valve;
a regulator for setting an actuation pressure of the valve, the regulator coupled to the port plate and having a passageway in communication with a passageway through the port plate to the cavity; and
a manual opening mechanism including a valve stem for manually moving the piston to open and close the valve, the manual opening mechanism extending through an opening in the port plate that is in axial alignment with the piston,
wherein the port plate is configured for removably coupling to the valve body in one of a number of different configurations for converting the valve from solenoid operation, to regulator operation, or to regulator operation with multiple functional features.
2. The valve of claim 1, further comprising a strainer coupled to the valve body such that flow through the inlet of the valve body passes through the strainer.
3. The valve of claim 1, wherein the port plate includes
a first port extending through the port plate along a first axis that is angularly offset from a central axis of the port plate;
a second port extending through the port plate along a second axis that is angularly offset from the central axis; and
a third port extending through the port plate along a third axis that is angularly offset from the central axis;
wherein the offset of the respective axes of the respective ports through the port plate allows a subassembly to be coupled to and removed from one of the ports in the port plate without interference from subassemblies coupled to other ports in the port plate.
4. A valve for a refrigeration system comprising:
a valve body having an inlet port, an outlet port, and walls forming a main cavity;
a cartridge configured to reside within the main cavity and having a cylinder in which a piston is movable in a first direction to permit fluid flow from the inlet port to the outlet port and in a second direction to impede fluid flow from the inlet port to the outlet port; and
a port plate removably mounted to the valve body for closing an end opening of the main cavity through which the cartridge can be inserted into and removed from the main cavity, the port plate including a plurality of functional ports, each functional port configured to accept at least one of plural valve control elements configured to control the piston to permit or impede the fluid flow from the inlet port to the outlet port, each functional port being disposed at an acute angle relative to a central axis of the piston so that a valve control element mounted to a respective functional port will not block access to fasteners securing the port plate to the valve body so that the port plate can be removed from the valve body without removal of the control element or control elements from the port plate.
5. The valve of claim 4, wherein the cartridge residing within the main cavity becomes accessible without disconnecting the valve from the refrigeration system by removing the port plate from the valve body.
6. The valve of claim 4, wherein the valve body has an inlet pressure passageway and the port plate and the cartridge have walls forming part of an annular passageway, the inlet pressure passageway and the annular passageway in fluid communication with the inlet port, wherein fluid pressure from the inlet port controls the piston to permit or impede the fluid flow from the inlet port to the outlet port.
7. The valve of claim 4, wherein each of the ports is configured to accept one of various valve control elements for the valve to be configurable in a number of different configurations including a configuration simultaneously including a solenoid control and a regulator operation.
8. The valve of claim 4, wherein the acute angle is 25 degrees, 35 degrees, 45 degrees, 55 degrees, 65 degrees, or a range of from 25 degrees to 65 degrees.
9. The valve of claim 4, comprising:
a manual opening mechanism including a valve stem and configured for manually moving the piston to permit or impede the fluid flow from the inlet port to the outlet port, wherein at least a portion of the manual opening mechanism extends through an opening in the port plate that is in axial alignment with the piston.
10. The valve of claim 4, wherein the cartridge comprises:
a cartridge body forming a housing and having a seat;
an elongated stem having a radially enlarged head portion for sealing against a seat; and
the piston extending radially outward from the stem at an end of the stem opposite the radially enlarged head portion;
wherein the cartridge body includes a shelf between the radially enlarged head portion and the piston, the shelf portion having a relief hole for fluid flow into and out of a chamber formed by a surface of the piston and an upper surface of the shelf.
11-14. (canceled)
15. The valve of claim 4, wherein the cartridge includes
a cartridge body forming a piston chamber and a valve seat;
a valve member for sealing against the valve seat; and
the piston movable in the cylinder, wherein the piston is movable axially in the piston chamber and connected coaxially to the valve member for moving the valve member;
wherein the cartridge body includes a shelf interposed between the valve member and the piston so as to block the flow of fluid passing through the valve seat from directly impinging on the piston, and at least one relief flow passage fluidly connecting fluid pressure from a valve seat side of the shelf to a piston side of the shelf.
16. The cartridge of claim 15, wherein the valve member is connected to the piston by a valve stem extending through an opening in the shelf.
17. The cartridge of claim 15, wherein a spring is interposed between the piston and shelf for biasing the valve member against the valve seat.
18. The cartridge of claim 15, wherein the cartridge body has a shoulder for engaging a corresponding shoulder of a valve body for axially positioning the cartridge in the valve body, and the cartridge further has a nose portion having a width less than the width of the shoulder and forming at its distal end the valve seat.
19. The cartridge of claim 15, wherein the relief flow passage opens to a reduced diameter side wall of the cartridge.
20. The valve of claim 1, wherein the axial alignment of the manual opening mechanism and the piston includes each of the manual opening mechanism and piston having central longitudinal axes extending therethrough being collinear.
21. The valve of claim 1, wherein the cavity includes a cylindania-shaped portion disposed between the inlet port and the inlet pressure passageway to direct contaminant away from the inlet pressure passageway, the cylindania-shaped portion having a central longitudinal axis aligned parallel to a central longitudinal axis of the inlet port.
22. The valve of claim 1, wherein the inlet pressure passageway provides fluid communication between the inlet port and the port plate, and wherein the outlet pressure passageway provides fluid communication between the outlet port and the port plate.