Re: [foxboro] CP60 Failure Error

Dear Kabir,

When you say, "One of the CP60s got the red indication" you mean the LEDs on 
the modules or the indication in SMDH?  If red in SMDH, what did the detail 
display show?

It appears from your messages below you lost communication briefly with a field 
device and shortly thereafter had a fault tolerant CP go single.  Because these 
happened relatively close together I'd certainly look at your fieldbus and 
cellbus installation, power and grounding.  There are fairly extensive 
recommendations for CP60 fieldbus installation and isolation - have these been 
followed?

What is 251550?  Is this an FBM43 with intelligent positioner?  How is the 
fieldbus installed on this CP60 - all copper, copper/fiber?  What I/O modules - 
100 series or 200 series? What fieldbus interface modules, and how many FBMs 
total and per interface?

Failsafe engineering is critical and needs more attention than a brief email, 
however the documentation does cover how to set failsafe actions when desired 
for FBMs and intelligent field devices.  You want your CP to maintain last good 
value of inputs?  Or your final control elements to maintain last good value on 
loss of comms with the CP?  Last good value is the default behavior but 
specific failsafe actions can be configured on a channel by channel basis as 
appropriate.  If failsafe actions are configured on some of your outputs, be 
very sure of the consequences before you change those back to use last good 
value.

Regards,

Kevin FitzGerrell



-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On 
Behalf Of kabir ahmed
Sent: Friday, July 17, 2009 1:42 PM
To: foxboro@xxxxxxxxxxxxx
Subject: [foxboro] CP60 Failure Error

 Dear Experts,

We've experienced a strange CP60 Failure and the details of the system is as 
follow:

CP60 Redundant on I/A system 6.5
with AW51E as Engineernig Station
two WP51D as Operator stations

One of the CP60s got the red indication  and system Alarm observed that became 
Blinking Green after few seconds but the CP60 remained red indicated.

the line printer showed the following messages in sequence

15-07-09 16:49:51    0    SYSMON = SYSMN2  03CP02 Process = PMAINT03CP02
PIOMAI   000002 hardware Fault 251550(Valve) FAILSAFE TIMOUT
 
15-07-09 17:52:25    0    SYSMON = SYSMN2  03CP02 Process = PMAINT03CP02 
PIOMAI   000002 hardware Fault 251550(Valve) FAILSAFE TIMOUT
 
15-07-09 18:01:00    0    SYSMON = SYSMN2  03CP02 Fault Tolerant Exec
 SM_MSG  -00047 Fault Tolerant Prim Module Now single. ROM Addr 00006C170EB0
 
15-07-09 18:01:02    0    SYSMON = SYSMN2  03CP02 Error Protocol
 FTXSS   000081 Error Escalation Threshold has been exceeded 00006C173E08
 
15-07-09 18:01:02    0    SYSMON = SYSMN2  03CP02 Error Protocol 
 FTXSS   000081 Error Escalation Threshold has been exceeded 00006C173E08   

Kindly Suggest possibile causes for such failure and How could we configure our 
CP in FAILSAFE mode so that it retain the last good value in case pf any such 
failure.

thanks

Kabir Ahmed
G.E.P I&C 
Pakistan Refinery Ltd.

K A B I R  AHMED

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