Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 120)

Troubleshooting
Chapter 7
7Ć36
diagnostic message codes are displayed by indicators connected to module group 5, slot 1 (figure 6.18), or by displaying the corresponding
data table word using the industrial terminal.
Use this table in conjunction with figure 7.1 and figure references shown in parentheses.
Type of Message
N = NonĆlatched
L = Latched
T = Trip Condition
Code
P = at PowerĆup
Alt = Alternate chassis
Ethr = Either chassis
Top = Top chassis
Bot = Bottom chassis
Binary Diagnostic Message (figure References) Code Type Hex
1111 1100 FC N Backplane error. Replace chassis. 2
1111 1101 FD N Hardware fault in 1771ĆPM module. 2
1111 1110 FE N Hardware fault in 1771ĆPM module. 2
1111 1111 FF N PowerĆup other 1771ĆPM module.
MicroĆinch Diagnostic Codes
(Examine module group 3, slot 1, bit 2, chassis A and B for MSB)
1 0101 1010 15A T MicroĆinch valve stem input is present though not configured.
1 0101 1011 15B T Alt MicroĆinch valve stem input is present though not configured.
1 1011 1100 1BC T MicroĆinch clutch pressure input is present though not configured.
1 1011 1101 1BD T MicroĆinch clutch pressure input is present when triacs are off.
1 1011 1110 1BE T MicroĆinch clutch pressure input is off when triacs are on.
1 1011 1111 1BF T MicroĆinch clutch pressure input remains on after triacs turn off.
1 1100 0000 1C0 T Ethr Triac 8 is on when commanded off.
1 1100 0001 1C1 T Ethr Triac 9 is on when commanded off.
1 1100 0110 1C6 T Bot Triac 8 is on when commanded off.
1 1100 0111 1C7 T Bot Triac 9 is on when commanded off.
1 1100 1100 1CC T Top Triac 8 is off when commanded on.
1 1100 1101 1CD T Top Triac 9 is off when commanded on.
1 1101 0010 1D2 T Ethr Triac 8 is off when commanded on.
1 1101 0011 1D3 T Ethr Triac is off when commanded on.