Programmable controller and methods of setting and displaying its internal information

A programmable controller equipped with a programmable controller unit and a peripheral device which store as internal information set values defined as reference values for judging the magnitudes of current values of predetermined information and which operate under the control of a sequence program, said programmable controller comprising:

• upper/lower limit value storage means disposed in said programmable controller unit for storing the upper and lower limit values of said set values;
• input means disposed in said peripheral device;
• register means for registering said upper and lower limit values entered from said input means into said upper/lower limit value storage means;
• judging means provided in said programmable controller unit for judging whether or not an input value entered from said input means lies within the range of said upper and lower limit values stored in said upper/lower limit value storage means;
• and
• internal information updating means for replacing said set value with said input value according to the upper/lower limit value range judgment of said judging means.

A method of setting the internal information of a programmable controller including a programmable controller unit and a peripheral device which store set values defined as reference values for judging the magnitudes of current values of predetermined information and which operate under the control of a sequence program, comprising the steps of:

• entering the upper arid lower limit values of said set values from said peripheral device and registering said entered upper and lower limit values into said peripheral device;
• entering an input value from the input means of said peripheral device;
• and
• judging whether or not said input value lies within the range of said upper and lower limit values stored in said upper/lower limit value storage means and replacing said set value with said input value according to an upper/lower limit value range judgment.

A method of setting the internal information of a programmable controller including a programmable controller unit and a peripheral device which store set values defined as reference values for judging the magnitudes of current values of predetermined information and which operate under the control of a sequence program, comprising the steps of:

• entering the upper and lower limit values of said set values from said peripheral device and registering said entered upper and lower limit values into said programmable controller unit;
• entering an input value from the input means of said peripheral device;
• and
• causing said programmable controller unit to judge whether or not said input value lies within the range of said upper and lower limit values stored in said upper/lower limit value storage means and to replace said set value with said input value according to an upper/lower limit value range judgment.

A method of setting the internal information of a programmable controller including a programmable controller unit and a peripheral device which store set values defined as reference values for judging the magnitudes of current values of predetermined information and which operate under the control of a sequence program, comprising the steps of:

• entering the upper and lower limit values of said set values from said peripheral device and registering said entered upper and lower limit values into said programmable controller unit;
• entering an input value from the input means of said peripheral device;
• and
• causing said peripheral device to judge whether or not said input value lies within the range of said upper and lower limit values stored in said upper/lower limit value storage means and replacing said set value with said input value according to an upper/lower limit value range judgment.

a programmable controller equipped with a programmable controller unit and a peripheral device which store as internal information set values as defined reference values for judging the magnitudes of current values of predetermined information and which operate under the control of a sequence program, said programmable controller comprising:

• upper/lower limit value storage means disposed in said programmable controller unit for storing the upper and lower limit values of said set values;
• input means disposed in said peripheral device;
• register means for registering said upper and lower limit values entered from said input means into said upper/lower limit value storage means;
• judging means provided in said peripheral device for judging whether or not an input value entered from said input means is within the range of said upper and lower limit values stored in said upper/lower limit value storage means;
• and
• internal information updating means for replacing said set value with said input value according to the upper/lower limit value range judgment of said judging means.