--- IMSE_MxM28_org.ups
+++ IMSE_MxM28.ups
@@ -843,7 +843,7 @@
       DATA[2]  := RWORD(1);      % Start register
       DATA[4]  := RWORD(8);      % Number of registers to read
             
-    ANSWER SIZE 20
+    ANSWER SIZE 21
       DATA[0]  =  BYTE(Addr);    % Modbus unit address
       DATA[1]  =  BYTE(3);       % Modbus command "03h" read multiple registers
       DATA[2]  =  BYTE(16);      % Numer of bytes of data, two for each DI
