Patent Number: 
Section: claims

1. A pattern writing system comprising:a plurality of control units configured to use different communication standards;a pattern writing unit configured to be controlled by the plurality of control units and write a pattern on a target object by using a charged particle beam;a storage unit configured to receive parameter information from an external slave computer and store the parameter information;a first interface information circuit group configured to output received parameter information to at least one of the plurality of control units in conformity with a communication standard on the at least one of plurality of control units;a main computer; anda second interface circuit group configured to receive a request from the main computer, input parameter information that has been set in the plurality of control units without passing through the storage unit, convert communication standards of the input parameter information into a communication standard used by the main computer, and output the parameter information whose each communication standard is converted to the main computer, wherein the second interface circuit group is different from the first interface information circuit group. 2. The system according to claim 1, wherein the main computer inputs each of reference parameter information serving as a standard for the plurality of control units, compares the each of reference parameter information with corresponding parameter information of the parameter information received from the second interface circuit group, and outputs the result. 3. The system according to claim 2, wherein the main computer forms a list of at least one set of different parameter information between the each of reference parameter information and the corresponding parameter information compared with each other. 4. The system according to claim 1, wherein the main computer receives each of real-time parameter information that has been set in the plurality of control units through the second interface circuit group. 5. The system according to claim 1, wherein the main computer receives each of the parameter information that has been set in the plurality of control units from the second interface circuit group without passing through the storage unit. 6. A parameter monitoring method for a pattern writing apparatus, comprising:receiving each of reference parameter information for setting in a plurality of control units which control the pattern writing apparatus and use different communication standards;receiving each of setting parameter information that has been set in the plurality of control units by an external computer through a storage device that can be accessed by said external computer, without passing through the storage device, wherein communication standards of the setting parameter information are converted by a first interface information circuit group before the setting parameter information is set in the plurality of control units passing through the storage device, and each of the setting parameter information that has been set in the plurality of control units is received after communication standards of the setting parameter information that has been set in the plurality of control units are converted by a second interface information circuit group which is different from the first interface information circuit group; andcomparing, via a processor, a received each of reference parameter information with corresponding setting parameter information of a received each of setting parameter information to output a result. 7. The method according to claim 6, further comprising:forming a list of at least one set of different parameter information between the each of reference parameter information and the corresponding setting parameter information compared with each other. 8. The method according to claim 6, wherein the each of setting parameter information received is real-time setting parameter information that has been set in the plurality of control units. 9. The method according to claim 6, wherein before receiving the each of setting parameter information, a communication standard of the each of setting parameter information is converted in conformity with a computer to receive the each of setting parameter information.