The client and the exchange transmit the Heartbeat
<0> message to verify connectivity during periods of inactivity. The exchange will send a Heartbeat anytime it has not transmitted a message during the heartbeat interval. The client is expected to employ the same logic.
|Tag||Field Name||Data Type||Req’d||Comments|
|Standard header||Y||MsgType |
|112||TestReqID||string||C||Identifier to be returned in resulting Heartbeat if requested from a TestRequest.|