Alarm types 20A and 50A are available for both single phase and 3-phase. A maximum of 31 units in a centralized control system can be established. Shinko protocol and Open Network Modbus are usable. UUC-UL pending. IP66 structure for the front panel allows usage in harsh environments where the controller is exposed to water or dust. Set value memory external selection SV1 to SV4 can be selected by external contact. Heater burnout alarm output Single phase or 3-phase heater burnout or deterioration can be detected.
For 3-phase, 2 pieces of CT are connected. Hexadecimal 0 to 9, A to F , which is divided into high order 4-bit and low order 4-bit out. Data format Sta rt bit : 1. Data bit : 7 bits. The data set value, decimal is converted to hexadecimal numbers. A negative num ber is represented by 2's complement. Numerals written below the command represent number of characters. Address Err or code Ch ecksum.
Header : Co ntrol code to represent the beginning of the command or the response. Negative acknowledgement : NAK 15H fixed. Instrument number Address : Numbers by which the master discerns ea c h slave.
Instrument number 0 to 94 and Global address Sub address : 20H fixed. Data item : Data classification of the command object.
C omposed of hexadecimal. Re fer to 7. C om muni c a tion com man d ta ble. Data : The contents of data s et value differ depending on the setting command.
Checksum : 2-character data to detect communication errors Refer to section 5. A T is performing. Checksum is used to detect receiving errors in the command or d ata. Set the program for the master side as well to calculate the checksum of the response data. SV: H Addre ss instrument number : 0 20H. A r equest message from the master is composed of data item, number of data and. A r esponse message from the slave is composed of number of bytes, data and.
Therefo r e the number of. The number of response byte is 02H. In the CRC system, the information is divided by polynomial series. The remainder is. A response message from the slave is composed of number of bytes, data and.
Therefore the number of. The number of response byte is 02H. Error check: bit data to detect communication errors. Refer to " 2 Error check of RTU mode". In the CRC system, the information is divided by polynomial series. The remainder is. The generation of polynomial series is. Shift X one bit to the right. When a carry is generated as a result of the shift, XOR is calculated by X of.
If a carry is not generated, go to step. XOR is calculated with the next data and X. Set X as CRC to the end of the message in sequence from low order to high order. The unit proceeds to Auxiliary function setting mode. The unit proceeds to Communication protocol selection. Set the instrument number of the controller individually.
Set the communication speed equal to that of the host. When the master sends the reading command, the slave. When the master sends the setting command, the slave. The slave will not respond to the master in the following cases:. Hexadecimal 0 to 9, A to F , which is divided into high order 4-bit and low order 4-bit out. The data set value, decimal is converted to hexadecimal numbers.
A negative number is represented by 2's complement.
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