1 real time sample value (word 0), 2 general configuration bits (word 1) – Spectrum Controls 1769sc-HART Modules User Manual
Page 56
Compact IO™ Isolated HART Analog Input Module
User's Manual 0300215-03 Rev. A
6-6
Table 6-2b (Module Configuration)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
26
Defines Slot
Variables
27
Defines Slot
Variables
28
Defines Slot
Variables
29
Defines Slot
Variables
30
Defines Slot
Variables
31
Defines Slot
Variables
32
Defines Slot
Variables
33
Defines Slot
Variables
Channel 3 HART Slot Variables 2 & 3
Channel 1 HART Slot Variables 2 & 3
Channel 2 HART Slot Variables 0 & 1
Channel 2 HART Slot Variables 2 & 3
Channel 3 HART Slot Variables 0 & 1
Word
Bit
Function
Channel 0 HART Slot Variables 2 & 3
Channel 0 HART Slot Variables 0 & 1
Channel 1 HART Slot Variables 0 & 1
6.4.1
Real Time Sample Value (Word 0)
The real time sample value determines when the module will scan its input channels for
available data. After the channels are scanned, the data is made available to the PLC.
The valid range for the real time sample is 0
1
to 5000 ms (i.e. Enter a value of 0 to 5000).
Note: The Real Time Sample rate must be greater than or equal to the slowest channel
step response time. See Table 6-5 to determine the proper RTS rate.
Note: The configuration file can also be modified through the control program, if
supported by the controller. For information on configuring the module using
RSLogix 500 (with MicroLogix 1500 controller), see Chapter 5; for RSLogix 5000
(CompactLogix controller), see Chapter 4.
6.4.2
General Configuration Bits (Word 1)
Word 1 is used to configure general module properties like enabling and disabling
HART, setting a HART handle time for HART messaging, and selecting one of three
scanning schemes for HART pass-through messages. The table below shows the
available settings for word 1.
Table 6-3 (General Configuration Bits)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Disable
0
Enabled
1
Disable
0
Enabled
1
Disable
0
Enabled
1
Disable
0
Enabled
1
Pass-Through Scheme
Two Channel Scans
0
0
Once Per Module Scan
0
1
Every Channel Scan
1
0
Reserved
Set to Zero
0
ETS
Disabled
0
Enabled
1
Make these bit settings
Handle Timeout (1 to 255 sec)
CH0 HART Enable
CH1 HART Enable
CH2 HART Enable
CH3 HART Enable
To Select
Handle Timeout
1
When RTS is set to zero, all channels are acquired freely and independently with no idle time. A channel
configured at a high filter frequency can be acquired multiple times in the time that a single acquisition is made for a
channel configured at a lower filter frequency.