Chapter 4: E2 Controller

4.9.7 Digital Output Packed Bit Variables

Table 4-35. Digital Output Packed Bit Variables.

Bit

Digital Outputs 1

Digital Outputs 2

 

 

 

0

Global alarm

Reserved

 

 

 

1

Custom alarm 1

Reserved

 

 

 

2

Master fan enable

Reserved

 

 

 

3

DX1 enable

Reserved

 

 

 

4

DX1 liquid line solenoid

Reserved

 

 

 

5

Humidifier enable

Reserved

 

 

 

6

Dual power output A

Reserved

 

 

 

7

Dual power output B

Reserved

 

 

 

8

Pump enable

Reserved

 

 

 

9

Custom alarm 2

Reserved

 

 

 

10

Custom alarm 3

Reserved

 

 

 

11

Reserved

Reserved

 

 

 

12

Reserved

Reserved

 

 

 

13

Reserved

Reserved

 

 

 

14

Reserved

Reserved

 

 

 

15

Reserved

Reserved

 

 

 

The R/W BMS variables fall into two categories. Variables like the temperature setpoint are permanent. As permanent variables, they retain their value regardless of power loss or BMS communications failure. The controller‘s flash memory is limited to one million write cycles for permanent variables. The other category is the integer and digital variables that start with “BMS.” These are expected to be changed frequently and require that the BMS is active when changing them. All BMS variables require that the BMS “keep alive” parameter (Variable 100) changes between 1 and 2 within a 10-minute span. The general procedure is to set up variables like the BMS low fan speed and then write a 1 to the BMS “keep alive” address. If the controller does not see a 2 written to the BMS “keep alive” address within 10 minutes, all the BMS variables will revert to their previous values.

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Black Box Black Box Cold Row DX, CRDX-W-FS-12KW, CRDX-A-FS-24KW, CRDX-G-FS-24KW Digital Output Packed Bit Variables
Page 110 Page 112

CRDX-W-FS-12KW, Black Box Cold Row DX, CRDX-W-FS-24KW, CRDX-A-FS-24KW, CRDX-A-FS-12KW specifications

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