Digital outputs (26), Override digital input (28), Override polarity (29) – Watlow CLS200, MLS300 and CAS200 User Manual
Page 61
Chapter 3: Controller Parameter Descriptions
Communications Specification 55
The Anafaze/AB protocol returns all 8 bits in 1 byte. See the table
below.
The Modbus-RTU protocol stores the states of the inputs in eight
individually addressable discrete input registers.
Digital Outputs (26)
This parameter contains the state of the controller’s digital outputs. If
the output is off (an open circuit), the value is 0. If the output is on, the
value is 1. To turn on an output, set the corresponding bit to 1.
The Anafaze/AB protocol stores the states for up to eight outputs in 1
byte. So, a total of 5 bytes are required to store the states of the 35
digital outputs in a controller. See the table below to decode the bits.
•
Default: 0 (off).
The Modbus-RTU protocol stores the states of the outputs in 35
individually addressable coil registers.
Override Digital Input (28)
This parameter enables the output override feature and selects a digital
input to trigger it. When the feature is enabled and the specified input is
activated, the controller sets all loops to manual mode at the heat and
cool outputs at the levels specified by the Output Override parameters.
•
Range: 0 to 8 (Disabled = 0, Enabled = 1 to 8, indicating the selected
digital input).
•
Default: 0.
Override Polarity (29)
Specify whether a low or high signal activates the output override
feature.
•
Range: 0 or 1 (Low = 0, High = 1).
•
Default: 0.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Input 8
Input 7
Input 6
input 5
Input 4
Input 3
Input 2
Input 1
Bit
7
Bit
6
Bit 5
Bit
4
Bit 3
Bit
2
Bit
1
Bit
0
Byte 0
8
7
6
5
4
3
2
1
Byte 1
16
15
14
13
12
11
10
9
Byte 2
24
23
22
21
20
19
18
17
Byte 3
32
31
30
29
28
27
26
25
Byte 4
Not used
35
34
33