EPRO PR9376/010-011前置器,PR9376/010-011使用教程
輸入/輸出擴(kuò)展器總線接口支持通信
在處理器模塊和HSS模塊之間。該通信信道是一個(gè)八位并行數(shù)據(jù)總線，具有兩個(gè)控制線。貝利設(shè)計(jì)的集成電路執(zhí)行
用于連接數(shù)據(jù)和狀態(tài)的通信協(xié)議信息傳輸至處理器模塊。它執(zhí)行地址比較、讀/寫選通生成，并包含總線驅(qū)動(dòng)程序和接收器。
EPRO PR9376/010-011前置器輸入/輸出擴(kuò)展器總線地址通過設(shè)置HSS模塊上的DIP開關(guān)。地址字節(jié)位于每個(gè)數(shù)據(jù)傳輸。輸入/輸出擴(kuò)展器總線集成電路執(zhí)行允許數(shù)據(jù)在I/O上傳輸之前的地址比較擴(kuò)展器總線。如果地址匹配，MFP模塊可以輸入/輸出擴(kuò)展器總線的選通數(shù)據(jù)。MFP模塊通過輸入/輸出擴(kuò)展器總線向HSS模塊發(fā)送以下信息和命令接口：
?職位需求。
?LVDT頻率。
?控制器死區(qū)。
?LVDT錯(cuò)誤時(shí)的閥門動(dòng)作。
?塊輸出顯示單元。
?校準(zhǔn)差分電壓值。
?解調(diào)器和比例增益值。
?硬手動(dòng)模式啟用。
?校準(zhǔn)/操作模式選擇。
?校準(zhǔn)進(jìn)入/保持狀態(tài)。
?校準(zhǔn)沖程時(shí)間。
?校準(zhǔn)周期數(shù)。
?空檢查請(qǐng)求。
The I/O expander bus interface enables communication
between the processor module and the HSS module. This communication channel is an eight-bit parallel data bus with two
control lines. A Bailey designed integrated circuit performs the
communications protocol for interfacing the data and status
information to the processor module. It performs address compare, read/write strobe generation and contains bus drivers
and receivers.
The I/O expander bus address is selected by setting a
dipswitch on the HSS module. The address byte precedes every
data transfer. The I/O expander bus integrated circuit does an
address comparison before allowing data to transfer on the I/O
expander bus. If the addresses match, the MFP module can
strobe data to or from the I/O expander bus.The MFP module sends the following information and commands to the HSS module by way of the I/O expander bus
interface:
? Position demand.
? LVDT frequency.
? Controller deadband.
? Valve action on LVDT error.
? Block output display units.
? Calibration differential voltage values.
? Demodulator and proportional gain values.
? Hard manual mode enable.
? Calibrate/operate mode select.
? Calibrate go/hold status.
? Calibration stroke time.
? Number of calibration cycles.
? Null check request.
