diff --git a/app/flib_cfg/flib_cfg.cpp b/app/flib_cfg/flib_cfg.cpp
index c1bffe699..5c4ca6061 100644
--- a/app/flib_cfg/flib_cfg.cpp
+++ b/app/flib_cfg/flib_cfg.cpp
@@ -52,6 +52,7 @@ int main(int argc, char* argv[]) {
           return EXIT_FAILURE;
         }
         flims.back()->reset_datapath();
+        flims.back()->set_mc_size_limit(par.mc_size_limit());
         if (!flims.back()->get_pgen_present()) {
           L_(fatal) << "Link " << i << ": "
                     << "FLIM build does not support pgen";
@@ -72,6 +73,7 @@ int main(int argc, char* argv[]) {
           return EXIT_FAILURE;
         }
         flims.back()->reset_datapath();
+        flims.back()->set_mc_size_limit(par.mc_size_limit());
         if (par.link(i).source == flim) {
           flims.back()->set_data_source(flib::flim::user);
         } else { // pgen_far
diff --git a/app/flib_cfg/parameters.hpp b/app/flib_cfg/parameters.hpp
index ef59127c9..54b4ac016 100644
--- a/app/flib_cfg/parameters.hpp
+++ b/app/flib_cfg/parameters.hpp
@@ -82,6 +82,7 @@ class parameters {
   bool identify() const { return _identify; }
   uint32_t mc_size() const { return _mc_size; }
   float pgen_rate() const { return _pgen_rate; }
+  uint32_t mc_size_limit() const { return _mc_size_limit; }
 
   struct link_config link(size_t i) const {
     return _links.at(i);
@@ -154,6 +155,8 @@ class parameters {
                "1024 ns (31 bit wide)");
     config_add("pgen-rate,r", po::value<float>(),
                "MS fill level of pattern generator in [0,1]");
+    config_add("mc-size-limit", po::value<uint32_t>(&_mc_size_limit),
+               "Threshold of micsolice size limiter in bytes.");
 
     config_add("l0_source", po::value<std::string>(),
                "Link 0 data source <disable|flim|pgen_far|pgen_near>");
@@ -275,5 +278,6 @@ class parameters {
   bool _identify = false;
   uint32_t _mc_size = 10; // 10,24 us
   float _pgen_rate = 1;
+  uint32_t _mc_size_limit = 2 ^ 20; // 1MB
   std::array<struct link_config, _num_flib_links> _links = {{}};
 };
diff --git a/contrib/readout b/contrib/readout
index 08fa8044d..8546f7a49 100755
--- a/contrib/readout
+++ b/contrib/readout
@@ -60,6 +60,7 @@ BASE_EQID[0]=0xF00
 BASE_EQID[1]=0xF01
 
 PGEN_RATE=0.14
+MC_SIZE_LIMIT=2097152
 
 if [ "$RECORD" = true ]; then
     TS_PROCESSOR="./tsclient -c%i -s%s -a --output-archive-bytes 2000000000 -o ${OUTFILE}%n.tsa"
@@ -68,7 +69,7 @@ else
 fi
 
 FLESNET_CFG=(-l 2 --timeslice-size 100 --overlap-size 1 
---in-data-buffer-size-exp 27 --cn-data-buffer-size-exp 27 
+--cn-data-buffer-size-exp 28 
 --processor-instances 1)
 
 ##### configuration above this line ########
@@ -131,7 +132,7 @@ $ROOT_DIR/contrib/flesnet-check
 echo "Configuring FLIBs ..."
 for i in 0 1; do
 $BINDIR/flib_cfg -c /dev/null -l 2 -L ${OUTFILE}f${i}_cfg.log -i ${ADDR[$i]} \
-                 -t 100 -r $PGEN_RATE \
+                 -t 100 -r $PGEN_RATE --mc-size-limit $MC_SIZE_LIMIT \
                  --l0_source ${LINK[0+$i*8]} --l0_eq_id ${BASE_EQID[$i]}0 \
                  --l1_source ${LINK[1+$i*8]} --l1_eq_id ${BASE_EQID[$i]}1 \
                  --l2_source ${LINK[2+$i*8]} --l2_eq_id ${BASE_EQID[$i]}2 \
@@ -146,12 +147,12 @@ done
 echo "Starting flib_server ..."
 if [ ${#IN_INDEX_0[@]} -ne 0 ]; then
     $BINDIR/flib_server -c /dev/null -L ${OUTFILE}f0_server.log -i ${ADDR[0]} \
-                    -o shm_server_f0 &
+                    --data-buffer-size-exp 28 -o shm_server_f0 &
     SERVER_0_PID=$!
 fi
 if [ ${#IN_INDEX_1[@]} -ne 0 ]; then
     $BINDIR/flib_server -c /dev/null -L ${OUTFILE}f1_server.log -i ${ADDR[1]} \
-                    -o shm_server_f1 &
+                    --data-buffer-size-exp 28 -o shm_server_f1 &
     SERVER_1_PID=$!
 fi
  
diff --git a/lib/flib/flim.cpp b/lib/flib/flim.cpp
index 375c72efa..3b1f8af3c 100644
--- a/lib/flib/flim.cpp
+++ b/lib/flib/flim.cpp
@@ -104,6 +104,11 @@ uint32_t flim::get_pgen_mc_pending() {
   return m_rfflim->get_reg(RORC_REG_LINK_MC_PGEN_MC_PENDING);
 }
 
+void flim::set_mc_size_limit(uint32_t bytes) {
+  uint32_t words = bytes / 8; // sizeof(word) == 64Bit
+  m_rfflim->set_reg(RORC_REG_LINK_MAX_MC_WORDS, words);
+}
+
 //////*** FLIM Test and Debug ***//////
 
 void flim::set_testreg(uint32_t data) {
diff --git a/lib/flib/flim.hpp b/lib/flib/flim.hpp
index 4b74c8f60..cc0f84679 100644
--- a/lib/flib/flim.hpp
+++ b/lib/flib/flim.hpp
@@ -39,6 +39,7 @@ class flim {
   void set_pgen_enable(bool enable);
   void reset_pgen_mc_pending();
   uint32_t get_pgen_mc_pending();
+  void set_mc_size_limit(uint32_t bytes);
 
   void set_testreg(uint32_t data);
   uint32_t get_testreg();