ABB 07AI91 GJR5251600R0202 Analog input unit

ABB 07AI91 GJR5251600R0202 Analog input unit

Pull SLOT0SEL* low to deassert the SS* line and establish conditions for writing a new slotselect number to the Slot 0 Slot-Select Register. 4. If another slot will not be selected, it is recommended that you write zero to the Slot 0 Slot-Select Register. Figure 2-20 illustrates a write to the SCXI-1140 Configuration Register of the binary pattern:To read from the Module ID Register, follow these steps: 1. Initial conditions: SS* asserted low. SERDATIN = don't care. DAQD*/A = 1. Make sure DAQD*/A does not go low or erroneous data will be written to the Configuration Register. SLOT0SEL* = 1. SERCLK = 1 (and has not changed since SS* went low). 2. For each bit to be read: a. Clear SERCLK = 0 b. Set SERCLK = 1. Clock the data. If you are using an MIO-16 board, a write to the EXTSTROBE Register will cause EXTSTROBE* to pulse low, thus accomplishing steps b and c.

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