AH500 Module Manual 10.4 Configuration of AH10DNET -5A 10.4.1 Data Mapping Areas This section is going to introduce the mapping relations between an AH500 series CPU module and AH10DNET-5A. An AH500 series CPU module can be extended by connecting maximum 8 AH10DNET-5A scanner modules which could only be installed to the main backplane. After AH10DNET-5A and an AH500 series CPU module is connected, users could specify the starting register addresses for the input mapping and output mapping. When only one backplane exists and there are several AH10DNET-5As on the right side of an AH500 series CPU module, the software distinguishes different AH10DNET-5As according to their unit numbers.
The farther the scanner module is away from an AH500 series CPU module, the larger its unit number is. The unit number of the first AH10DNET-5A of the right side of an AH500 series CPU module is 1. The next one nearest to the first scanner module is 2. And the following ones will be 3, 4 and so on. 10.4.2 Assignment of Mapping Area (in Master Mode) While AH10DNET-5A works in master mode and the starting addresses for output and input are specified as D500 and D1000 respectively, the mapping area will be assigned as the following table is. Note: D1000 and D500 in the above table are the starting addresses in the mapping area.
If the addresses are set to other registers, the corresponding function will be assigned to other registers. If the length of DeviceNet input data area is 3 words, AH10DNET-5A will occupy D1000~D1004 and D1005~D1007 in an AH500 series CPU module automatically. Meanwhile, if the length of DeviceNet output data area is 2 words, AH10DNET-5A will occupy D500~D504 and D505~D506 in an AH500 series CPU module automatically. 10-14 Input area: Slave->Master Output area: Master->Slave AH500 series AH500 series Data Data CPU module Purpose CPU module Purpose Length Length Register No. Register No.
D1000~D1003 Scan list node status display area (See section 10.6.1.) 4 words D500~D503 Bit-strobe command area (See section 10.5.) 4 words D1004 Scanner module status display area (See section 10.6.2.) 1 word D504 Reserved 1 word D1005~D1494 DeviceNet input data area: these registers are used for receiving the status data feedback from the slave. Max. length: 490 words D505~D994 DeviceNet output data area: the values in these registers are sent to the slave as the control data. Max. length: 490 words