9.3 Communication Format9-79.3.3 Format of Request Data Part and Response Data Part• The device information given to the rear part of each command and response is as follows.• The data sequence and the number of data vary depending on the unit of read and write andthe device type.• These data are sent from the low bytes. Components of request data and response data partsNo. Name Description① Starting device The starting number of a target device for read and write is specified as 6-digithex 3-byte data.② Device code The device code to indicate a device type is specified.③ No. of devicesThe number of devices which perform read and write is specified.The number of words is specified for word devices and the number of bits isspecified for bit devices.For reading and writing bit devices such as internal relays in word units, specifythe number of words.④ Data The data sequence varies depeding on the device type and transfer unit forperforming read and write. Reading and writing word devicesFor reading or writing three words starting with the device no. 100 of the data register of MCprotocol, i.e. D00100 to D00102 (FP7 device nos.: DT100 to DT102);③① ②00h A8h 03h 00h64hL H L H L HL H L H④00h 00h64h 00hC8h 01h２ChNo. Name Description① Starting device Specify H000064=100 for the starting device number as 3-byte data.② Device code Specify the device code A8.③ No. of devices Specify the number of words, 3.④Send/Receivedata on MCprotocolRead or write 3-word data.
