Hello,
IPS does not support syslog. Instead you can use SNMP or SDEE. For SDEE you can use cisco IME tool.
SNMP
http://www.cisco.com/c/en/us/td/docs/security/ips/7-0/configuration/guide/cli/cliguide7/cli_snmp.html
SDEE
https://supportforums.cisco.com/document/47881/sdee-and-ips
I hope this helps you.
Johan.