DeviceNet Slave Communication Module IFD9502 32 words. „ The length of I/O data to be exchanged can be modified through changing Class9C as listed below, but the start device of I/O mapping cannot be changed. The modification will be valid after IFD9502 is re-powered. Maximum 64 words are allowed for I/O data „ If you are to return the I/O mapping to default setting, change Attribute1 of Instance1 of exchange. Class 0x9C into H’0001 and re-power IFD9502. Please note that doing so can only recover the current I/O data mapping in HMI. „ Class 0x9C Data Config Instance0: Instance1:
3.6 When IFD9502 is connected to custom equipment In the custom mode, IFD9502 can still establish EXP/IO connection when there is no equipment connected to it. 1. Settings of the equipment connected to IFD9502 in custom mode Before connecting the custom equipment to bus through IFD9502, you have to configure and check the following parameters. y Configuration of the equipment: RS-485 or RS-232 communication y Node address of the equipment: 01 y Baud rate of the equipment: 19,200bps y Communication format of the equipment: 8, N, 2, RTU y According to the actual need, configure the I/O mapping between IFD9502 and the equipment in the configuration software. 2.
Reading and modifying parameters in the custom equipment z IFD9502 allows you to inquire the custom equipment by explicit messages (fits in Modbus protocol). The format of inquiry is shown in the table below.
DVP-PLC Application Manual 22 Attribute ID Access rule Name Data type 1 Get Revision UINT Attribute ID Access rule Name Data yype Default 1 Get/Set Reset parameter USINT H’0000 2 Get/Set Input data length USINT 4 words 3 Get/Set Output data length USINT 4 words Byte position Data written into custom equipment Data read from custom equipment 0 Frag [0]+XID+MAC ID Frag [0]+XID+MAC ID 1 R/R [0]+Service code [0x10] R/R [0]+Service code [0x0E] 2 Class ID [0x9E] Class ID [0x9E] 3 Instance ID LSB Instance ID LSB 4 Instance ID MSB Instance ID MSB