Selectable Input Data Function; Output Word Am.1 "Input Address" [Input Address] - Festo MSE6-E2M Original Instructions Manual

6 Input/output data
6.3

Selectable input data function

The selectable input data function allows extended read access to functional module data (e. g. pres­
sure change). The extended read access must be performed by the user as follows.
1. Set the desired address in the output word Am.1
2. Compare input word Em.4 (current input address) and output word Am.1 (set address)
3. Distinguish between the following cases:
• Address is identical
= Read valid data of input word Em.5
• Addresses differ (Em.4, B15 (ERR) == 1)
= Set address not available, set valid address
• Addresses differ (Em.4, B14 (BUSY) == 1)
= Data processing not yet completed, repeat address comparison
As long as the selected address remains unchanged, a comparison of the addresses and an evaluation
of the ERR and BUSY bit is not necessary. The data is updated cyclically.
6.3.1

Output word Am.1 "Input address" [Input address]

The output word is shown in Motorola format (MSB-LSB).
In so doing, the address is transmitted.
Data format of output word "16 bits, right-justified"
D15 D14 D13 D12 D11 D10 D9
B15 B14 B13 B12 B11 B10 B9
MSB
Abbreviations used
B0 ... B13: SEL_ADR: 14 bit address of the requested read value
B14, B15: Output bits with fixed value "0"
D0 ... D15 16 bit output data field
MSB/LSB Most significant bit/least significant bit
Tab. 6.10 Data format of output word "16 bits, right-justified"
With the MSE6-E2M only the following selectable input address can be selected.
Output word Am.1
Input address
Decimal:
0
Tab. 6.11 Selectable input address
Other input addresses are ignored and signalled as not available (Em.4, B15 (ERR) == 1).
68
D8
B8
Hexadecimal:
0x0000
D7 D6 D5 D4
B7 B6 B5 B4
Input word Em.5
Selected input data
Pressure change DP2
Festo – MSE6-E2M-SY-EN – 1703d – English
D3 D2 D1 D0
B3 B2 B1 B0
LSB