Manual 35018V1
505XT Digital Control System for Steam Turbines
Woodward
22
Each relay can be programmed to provide a contact related to a conditional state as listed in the first list,
or it can be triggered as a level-active switch as per the second list
Conditional States
Table 1-4. Selectable functions for Relay Output States
1
--- Not Used ---
41 Cascade PID in Control
2
Summary Shutdown
42 Spare 42
3
Summary Shutdown (Trip Relay)
43 Spare 43
4
Summary Alarm
44 Spare 44
5
All Alarms Clear
45 Unit OK (No SD)
6
Control Status OK
46 Remote KW SP Enabled
7
Overspeed Trip
47 Remote KW Setpoint Active
8
Overspeed Test Enabled
48 Manual Relay Control
9
Speed PID in Control
49 Isolated Controller in Auto
10
Remote Speed Setpoint Enabled
50 LP Valve Limiter in Control
11
Remote Speed Setpoint Active
51 Extr/Adm Control Enabled
12
Underspeed Switch
52 Extr/Adm Control Active
13
Auto Start Sequence Halted
53 Extr/Adm PID In Control
14
On-Line Speed PID Dynamics Mode
54 Remote Extr/Adm Setpoint Enabled
15
Local Interface Mode Selected
55 Remote Extr/Adm Setpoint Active
16
Frequency Control Armed
56 Inlet Pressure Control Enabled
17
Frequency Control
57 Inlet Pressure Control Active
18
Sync Input Enabled
58 Inlet Pressure PID In Control
19
Sync / Loadshare Input Enabled
59 Remote Inlet Pressure Setpoint Enabled
20
Loadshare Mode Active
60 Remote Inlet Pressure Setpoint Active
21
Cascade Control Enabled
61 Exhaust Pressure Control Enabled
22
Cascade Control Active
62 Exhaust Pressure Control Active
23
Remote Cascade Setpoint Enabled
63 Exhaust Pressure PID In Control
24
Remote Cascade Setpoint Active
64 Remote Exhaust Pressure SP Enabled
25
Auxiliary Control Enabled
65 Remote Exhaust Pressure SP Active
26
Auxiliary Control Active
66 Priority Selected
27
Auxiliary PID in Control
67 Alternate Mode Enabled
28
Remote Auxiliary Setpoint Enabled
68 Controlling on Steam Map Limiter
29
Remote Auxiliary Setpoint Active 69
Priority
Active
30
Spare_30
70 Extr/Adm Input Failed
31
Spare_31
71 Inlet Pressure Input Failed
32
Spare_32
72 Exhaust Pressure Input Failed
33 Spare_33
73 Zero
Speed
34 Spare_34
74 Spare_74
35
HP Valve Limiter in Control
75 Spare_75
36
Command from Modbus BW addresses
76 Spare_76
37
Reset Pulse (2 sec)
77 Spare_77
38
Open GEN Breaker Cmd
78 Spare_78
39 Feed-Forward
Enabled
79 Spare_79
40 Feed-Forward
Active
80 Spare_80
Level activated switch using this value:
Table 1-5. Selectable functions for Relay Output Level switches
1
--- Not Used ---
26 Ext/Adm Demand (P Demand)
2
Actual Speed
27 Inlet Pressure Setpoint
3
Speed Setpoint
28 Inlet Pressure Demand (Q Demand)
4
KW Input
29 Exhaust Pressure Setpoint
5
Sync/Load Share Input
30 Exhaust Pressure Demand (R Demand)
6 Cascade
Input
31 Spare_31