Watlow Series SD31 PID with Optional Countdown Timer Manual de usuario Pagina 62
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- Tabla de contenidos
- SOLUCIÓN DE PROBLEMAS
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
Watlow Series SD31 ■ 60 ■ Chapter 10 Features
Indication Probable Cause(s) Corrective Action
No power.
Controller appears dead.
No display indication in either
window.
Power to unit may be off.
Fuse may be blown.
Breaker may be tripped.
Safety interlock door switch, etc. may be acti-
vated.
Separate system limit control may be latched.
Wiring may be open.
Input power may be incorrect.
Check switches, fuses, breakers, interlocks,
limit devices, connectors, etc. for energized
condition and proper connection.
Measure power upstream for required level.
Verify supply power requirements using the
part number.
Check wire size.
Check for bad connections.
Set point value not displayed
Display Default [~dsp] (Setup)
is not set to
[`Set]
. Press
ß
key to access set point.
Verify that
[~dSP]
is at the desired setting.
Process value not displayed
Display Default [~dsp] (Setup)
is not set to
[proc]
. Press
ß
key to access process val-
ue.
Verify that
[~dSP]
is at the desired setting.
Cannot establish serial data com-
munications with the controller.
Address parameter may be incorrectly set.
Baud rate parameter may be incorrectly set.
Unit-to-unit daisy chain may be disconnected.
Communications wiring may be reversed,
shorted or open.
EIA-485 converter box may be incorrectly
wired.
Computer’s COM port may be incorrectly set
up.
Communications software setup or address
may be incorrect.
PC software’s protocol or parity may be wrong.
Parity should be 8, n, 1.
Application software is not working properly.
May need termination, pull-up and pull-down
resistors.
Check Setup Page and set to correct address.
Check Setup Page and set to correct baud
rate.
Look for a break in the daisy chain.
Verify correct connections and test wiring
paths.
Check converter box wiring and its documen-
tation.
Reconfigure computer’s COM port setup and
verify that communications are ok.
Check the communication card documentation
for settable variables and operational testing.
Restart PC software and check for settings
agreement. Verify the COM bus is active.
Verify operation with Watlow communications
tool available at www.watlow.com.
Add termination resistors for EIA/TIA-485
(see Install and Wire chapter).
Output signal is on when it
should not be.
Output wiring is incorrect. Verify the output wiring.
Output parameters are set incorrectly. Verify the output parameter settings.
DC voltage applied to output option “K” (solid-
state relay output).
Solid-state relay option can be used with al-
ternating current (ac) voltage only.
Output signal is not on when it
should be.
Output wiring is incorrect. Verify the output wiring.
For solid-state relay (option “K”) and mechani-
cal relay (option “E” or “J”), power must be ap-
plied.
Verify that power is applied to the output. The
output simply acts as a switch.
Output parameters are set incorrectly. Verify the output parameter settings.
Troubleshooting
- User’s Manual 1
- Series SD31 1
- Single Display PID Controller 1
- Safety Information 2
- Technical Assistance 2
- Warranty 2
- Table of Contents 3
- Overview 4
- autotune 5
- Install and Wire 6
- Removing the SD31 Controller 7
- Wiring the Series SD31 8
- Figure 7b — RTD Input (100 9
- Figure 7c — 0 to 10V 9
- Figure 7d — 0 to 50mV 9
- 0 to 20 mA Process Input 10
- Output 1 Mechanical Relay 10
- Output 1 Solid-state Relay 10
- Output 1 Switched DC 11
- Output 1 Process 11
- Output 2 Mechanical Relay 11
- Output 2 Solid-state Relay 12
- Output 2 Switched DC 12
- Output 2 EIA/TIA-485 12
- 12VÎ (dc) 13
- Ethernet Gateway 14
- Home Page Overview 17
- ;ht] Rate Heat 18
- Setup Page Overview 19
- Factory Page Overview 20
- Programming Page Overview 20
- Read/Write 21
- Offset the input reading 31
- Programming Page Example 37
- Countdown Timer 38
- • SP is used when not timing 40
- Timer Example 44
- Calibrating the Series SD31 48
- Process Output Procedures 49
- Restoring Factory Calibration 49
- Features 50
- Operations Page 51
- Autotuning 51
- IS1 IS2 IS3 IS4 52
- 123 456 789 258 52
- Filter Time Constant 53
- Sensor Selection 53
- Access Lockout 53
- High Scale and Low Scale 53
- Control Methods 54
- On-Off Control 55
- Proportional Control 55
- (PID) Control 56
- Dead Band 56
- Nonlinear output curve 57
- Independent Heat and Cool PID 57
- Variable Time Base 57
- Process or Deviation Alarms 58
- Alarm Set Points 58
- Alarm Hysteresis 59
- Alarm Latching 59
- Alarm Silencing 59
- Retransmit 59
- Communications 60
- Troubleshooting 62
- Error Messages 64
- Appendix 65
- Power Supply H or L 67
- Output 1 C, K, F or J 67
- Output 2 A, C, K, J or U 67
- Timer Option A or T 67
- Prompt Index 70
- Series SD 71
- How to Reach Us 72
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