Rockwell Automation 900 Temperature Controller Communications Functions - Series B - Manual (Page 57)

Publication 900-UM004D-EN-E - July 2010
Communications Data 3-15
The table below shows the status details.
Table 3.4 Status Details
Bit
Position Status Bit Description
0 1
Status
(lower word) 0 Heater overcurrent (CT1) Not generated Generated
1 Heater current hold (CT1)➊ Updated Hold
2 A/D Converter Error Not generated Generated
3 HS alarm (CT1) OFF ON
4 Spare OFF ---
5 Display range exceeded Not generated Generated
6 Input error Not generated Generated
7 Spare OFF ---
8 Control output (heating) OFF ON
9 Control output (cooling) OFF ON
10 HB (heater burnout) alarm output (CT1) OFF ON
11 HB (heater burnout) alarm output (CT2) OFF ON
12 Alarm 1 OFF ON
13 Alarm 2 OFF ON
14 Alarm 3 ➌ OFF ON
15 Program end output OFF ON
Status
(upper word) 16 Event input 1 OFF ON
17 Event input 2 OFF ON
18 Event input 3 ➋ OFF ON
19 Event input 4 ➋ OFF ON
20 Write mode Backup mode RAM write mode
21 EEPROM RAM = EEPROM RAM ≠ EEPROM
22 Setup area Setup area 0 Setup area 1
23 AT execute/cancel AT canceled AT execution in progress
24 Run/Stop Run Stop
25 Communications writing OFF (disabled) ON (enabled)
26 Auto/manual switch Automatic mode Manual mode
27 Program Start Reset Start
28 Heater overcurrent (CT2) Not generated Generated
29 Heater current hold (CT2) ➊ Update Hold
30 Spare OFF ---
31 HS alarm output (CT2) OFF ON
➊ When the control output ON time is less than 100 ms, the bit is set to “1” and the heater current is held at the last current value.
➋ NA 900-TC8, 900YC16, 900-TC32
➌ Applies to 900-TC8
Note 1: Spare bits are always OFF.
Note 2: When read in setup area 1, the status of the bits will be as follows:
•Overcurrent: Last value held
•A/D converter error: Last value held
•Input error: Last value held
•HB and HS outputs: cleared
•Program end output: cleared
•Current hold: Last value held
•Display Range Exceeded: Last value held
•Heating and Cooling Outputs: cleared
•Alarm Outputs: cleared