Detective Sergeant Steph Bradley, whose brother died on duty, will speak on behalf of the relatives who have been invited to attend the ceremony.
All officers who have died on duty will have their names, age and date of their death placed on the board.
The earliest honouree is Wolverhampton night watchman Richard Cooke who was killed after he was fatally hit on the head by a stone while intervening in a street affray in 1822.
Also mentioned are the 32 serving officers who lost their lives in World War II, including 16 Coventry officers, eight of whom died during an air raid on the city on 14/15 November 1940. Sixteen Birmingham officers who died during the war are also commemorated.
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Outbreaks of rain will move southwards turning clearer and colder.
Heavy showers with a chance of thunder but clearing this evening with clear spells overnight.
Showers are likely to break out which could turn heavy during the afternoon.